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-rw-r--r--gnu-system.am20
-rw-r--r--gnu/packages/attr.scm67
-rw-r--r--gnu/packages/backup.scm3
-rw-r--r--gnu/packages/base.scm34
-rw-r--r--gnu/packages/bash.scm33
-rw-r--r--gnu/packages/bdw-gc.scm15
-rw-r--r--gnu/packages/cmake.scm2
-rw-r--r--gnu/packages/commencement.scm155
-rw-r--r--gnu/packages/compression.scm10
-rw-r--r--gnu/packages/cross-base.scm6
-rw-r--r--gnu/packages/databases.scm17
-rw-r--r--gnu/packages/emacs.scm3
-rw-r--r--gnu/packages/file.scm4
-rw-r--r--gnu/packages/flex.scm6
-rw-r--r--gnu/packages/gcc.scm63
-rw-r--r--gnu/packages/gettext.scm66
-rw-r--r--gnu/packages/glib.scm4
-rw-r--r--gnu/packages/gnupg.scm10
-rw-r--r--gnu/packages/guile.scm3
-rw-r--r--gnu/packages/haskell.scm6
-rw-r--r--gnu/packages/ld-wrapper.in66
-rw-r--r--gnu/packages/libffi.scm7
-rw-r--r--gnu/packages/linux.scm73
-rw-r--r--gnu/packages/multiprecision.scm28
-rw-r--r--gnu/packages/ncurses.scm38
-rw-r--r--gnu/packages/package-management.scm2
-rw-r--r--gnu/packages/patches/emacs-source-date-epoch.patch20
-rw-r--r--gnu/packages/patches/findutils-absolute-paths.patch29
-rw-r--r--gnu/packages/patches/findutils-test-xargs.patch22
-rw-r--r--gnu/packages/patches/flex-bison-tests.patch24
-rw-r--r--gnu/packages/patches/gnutls-doc-fix.patch546
-rw-r--r--gnu/packages/patches/grep-CVE-2015-1345.patch17
-rw-r--r--gnu/packages/patches/grep-timing-sensitive-test.patch15
-rw-r--r--gnu/packages/patches/libarchive-bsdtar-test.patch74
-rw-r--r--gnu/packages/patches/perl-CVE-2015-8607.patch68
-rw-r--r--gnu/packages/patches/perl-deterministic-ordering.patch29
-rw-r--r--gnu/packages/patches/perl-module-pluggable-search.patch25
-rw-r--r--gnu/packages/patches/perl-no-build-time.patch26
-rw-r--r--gnu/packages/patches/perl-no-sys-dirs.patch152
-rw-r--r--gnu/packages/patches/perl-source-date-epoch.patch19
-rw-r--r--gnu/packages/patches/procps-make-3.82.patch14
-rw-r--r--gnu/packages/patches/python-2.7-search-paths.patch6
-rw-r--r--gnu/packages/patches/python-3-search-paths.patch6
-rw-r--r--gnu/packages/pcre.scm2
-rw-r--r--gnu/packages/perl.scm20
-rw-r--r--gnu/packages/pkg-config.scm6
-rw-r--r--gnu/packages/plotutils.scm4
-rw-r--r--gnu/packages/pulseaudio.scm11
-rw-r--r--gnu/packages/python.scm4
-rw-r--r--gnu/packages/ruby.scm176
-rw-r--r--gnu/packages/texinfo.scm1
-rw-r--r--gnu/packages/tls.scm24
-rw-r--r--gnu/packages/video.scm2
-rw-r--r--gnu/packages/webkit.scm2
-rw-r--r--guix/build-system/gnu.scm8
-rw-r--r--guix/build/gnu-build-system.scm16
-rw-r--r--guix/build/haskell-build-system.scm98
-rw-r--r--guix/build/python-build-system.scm9
-rw-r--r--guix/build/ruby-build-system.scm13
-rw-r--r--guix/build/utils.scm9
-rw-r--r--guix/search-paths.scm6
61 files changed, 1120 insertions, 1124 deletions
diff --git a/gnu-system.am b/gnu-system.am
index fa2f038402..0ce1a3f015 100644
--- a/gnu-system.am
+++ b/gnu-system.am
@@ -1,7 +1,7 @@
 # GNU Guix --- Functional package management for GNU
-# Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
+# Copyright © 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
 # Copyright © 2013, 2014, 2015 Andreas Enge <andreas@enge.fr>
-# Copyright © 2013, 2014, 2015 Mark H Weaver <mhw@netris.org>
+# Copyright © 2013, 2014, 2015, 2016 Mark H Weaver <mhw@netris.org>
 #
 # This file is part of GNU Guix.
 #
@@ -450,6 +450,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/duplicity-test_selection-tmp.patch	\
   gnu/packages/patches/elfutils-tests-ptrace.patch		\
   gnu/packages/patches/emacs-exec-path.patch			\
+  gnu/packages/patches/emacs-source-date-epoch.patch		\
   gnu/packages/patches/eudev-rules-directory.patch		\
   gnu/packages/patches/evilwm-lost-focus-bug.patch		\
   gnu/packages/patches/expat-CVE-2015-1283.patch		\
@@ -460,10 +461,9 @@ dist_patch_DATA =						\
   gnu/packages/patches/fasthenry-spUtils.patch			\
   gnu/packages/patches/fasthenry-spSolve.patch			\
   gnu/packages/patches/fasthenry-spFactor.patch			\
-  gnu/packages/patches/findutils-absolute-paths.patch		\
   gnu/packages/patches/findutils-localstatedir.patch		\
+  gnu/packages/patches/findutils-test-xargs.patch		\
   gnu/packages/patches/flashrom-use-libftdi1.patch		\
-  gnu/packages/patches/flex-bison-tests.patch			\
   gnu/packages/patches/flint-ldconfig.patch			\
   gnu/packages/patches/fltk-shared-lib-defines.patch		\
   gnu/packages/patches/freeimage-CVE-2015-0852.patch		\
@@ -483,6 +483,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/glib-tests-timer.patch			\
   gnu/packages/patches/glib-tests-gapplication.patch		\
   gnu/packages/patches/glibc-bootstrap-system.patch		\
+  gnu/packages/patches/glibc-hurd-extern-inline.patch		\
   gnu/packages/patches/glibc-ldd-x86_64.patch			\
   gnu/packages/patches/glibc-locales.patch			\
   gnu/packages/patches/glibc-locale-incompatibility.patch	\
@@ -491,11 +492,10 @@ dist_patch_DATA =						\
   gnu/packages/patches/gmp-arm-asm-nothumb.patch		\
   gnu/packages/patches/gmp-faulty-test.patch			\
   gnu/packages/patches/gnucash-price-quotes-perl.patch		\
-  gnu/packages/patches/gnutls-doc-fix.patch			\
   gnu/packages/patches/gobject-introspection-absolute-shlib-path.patch \
   gnu/packages/patches/gobject-introspection-cc.patch		\
   gnu/packages/patches/gobject-introspection-girepository.patch	\
-  gnu/packages/patches/grep-CVE-2015-1345.patch			\
+  gnu/packages/patches/grep-timing-sensitive-test.patch		\
   gnu/packages/patches/grub-CVE-2015-8370.patch			\
   gnu/packages/patches/grub-gets-undeclared.patch		\
   gnu/packages/patches/grub-freetype.patch			\
@@ -528,6 +528,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/liba52-link-with-libm.patch		\
   gnu/packages/patches/liba52-set-soname.patch			\
   gnu/packages/patches/liba52-use-mtune-not-mcpu.patch		\
+  gnu/packages/patches/libarchive-bsdtar-test.patch		\
   gnu/packages/patches/libarchive-CVE-2013-0211.patch		\
   gnu/packages/patches/libarchive-fix-lzo-test-case.patch	\
   gnu/packages/patches/libarchive-mtree-filename-length-fix.patch \
@@ -616,20 +617,23 @@ dist_patch_DATA =						\
   gnu/packages/patches/patchelf-rework-for-arm.patch		\
   gnu/packages/patches/patchutils-xfail-gendiff-tests.patch	\
   gnu/packages/patches/patch-hurd-path-max.patch		\
+  gnu/packages/patches/perl-CVE-2015-8607.patch			\
   gnu/packages/patches/perl-autosplit-default-time.patch	\
+  gnu/packages/patches/perl-deterministic-ordering.patch	\
   gnu/packages/patches/perl-finance-quote-unuse-mozilla-ca.patch \
   gnu/packages/patches/perl-gd-options-passthrough-and-fontconfig.patch \
-  gnu/packages/patches/perl-module-pluggable-search.patch	\
   gnu/packages/patches/perl-net-amazon-s3-moose-warning.patch	\
   gnu/packages/patches/perl-net-ssleay-disable-ede-test.patch	\
+  gnu/packages/patches/perl-no-build-time.patch			\
   gnu/packages/patches/perl-no-sys-dirs.patch			\
+  gnu/packages/patches/perl-source-date-epoch.patch		\
   gnu/packages/patches/perl-tk-x11-discover.patch		\
   gnu/packages/patches/pidgin-add-search-path.patch		\
   gnu/packages/patches/pingus-sdl-libs-config.patch		\
+  gnu/packages/patches/plink-1.07-unclobber-i.patch		\
   gnu/packages/patches/plotutils-libpng-jmpbuf.patch		\
   gnu/packages/patches/polkit-drop-test.patch			\
   gnu/packages/patches/portaudio-audacity-compat.patch		\
-  gnu/packages/patches/procps-make-3.82.patch			\
   gnu/packages/patches/pt-scotch-build-parallelism.patch	\
   gnu/packages/patches/pulseaudio-fix-mult-test.patch		\
   gnu/packages/patches/pulseaudio-longer-test-timeout.patch	\
diff --git a/gnu/packages/attr.scm b/gnu/packages/attr.scm
index f4f6c46642..53766af06f 100644
--- a/gnu/packages/attr.scm
+++ b/gnu/packages/attr.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2012 Nikita Karetnikov <nikita@karetnikov.org>
-;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -28,46 +28,41 @@
 (define-public attr
   (package
     (name "attr")
-    (version "2.4.46")
-    (source
-     (origin
-      (method url-fetch)
-      (uri (string-append "mirror://savannah/attr/attr-"
-                          version ".src.tar.gz"))
-      (sha256
-       (base32
-        "07qf6kb2zk512az481bbnsk9jycn477xpva1a726n5pzlzf9pmnw"))))
+    (version "2.4.47")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://savannah/attr/attr-"
+                                  version ".src.tar.gz"))
+              (sha256
+               (base32
+                "0nd8y0m6awc9ahv0ciiwf8gy54c8d3j51pw9xg7f7cn579jjyxr5"))))
     (build-system gnu-build-system)
     (arguments
      `(#:phases
-       (alist-cons-after
-        'configure 'patch-makefile-SHELL
-        (lambda _
-          (patch-makefile-SHELL "include/buildmacros"))
-        (alist-replace
-         'install
-         (lambda _
-           (zero? (system* "make"
-                           "install"
-                           "install-lib"
-                           "install-dev")))
+       (modify-phases %standard-phases
+         (add-after 'configure 'patch-makefile-SHELL
+           (lambda _
+             (patch-makefile-SHELL "include/buildmacros")))
+         (replace 'install
+           (lambda _
+             (zero? (system* "make"
+                             "install"
+                             "install-lib"
+                             "install-dev"))))
+         (replace 'check
+           (lambda* (#:key target #:allow-other-keys)
+             ;; Use the right shell.
+             (substitute* "test/run"
+               (("/bin/sh")
+                (which "bash")))
 
-         ;; When building natively, adjust the test cases.
-         ,(if (%current-target-system)
-              '%standard-phases
-              '(alist-replace 'check
-                              (lambda _
-                                ;; Use the right shell.
-                                (substitute* "test/run"
-                                  (("/bin/sh")
-                                   (which "bash")))
+             ;; When building natively, run the tests.
+             (unless target
+               (system* "make" "tests" "-C" "test"))
 
-                                (system* "make" "tests" "-C" "test")
-
-                                ;; XXX: Ignore the test result since this is
-                                ;; dependent on the underlying file system.
-                                #t)
-                              %standard-phases))))))
+             ;; XXX: Ignore the test result since this is
+             ;; dependent on the underlying file system.
+             #t)))))
     (inputs
      ;; Perl is needed to run tests; remove it from cross builds.
      (if (%current-target-system)
diff --git a/gnu/packages/backup.scm b/gnu/packages/backup.scm
index 40cfc4ee14..aa8ccbce69 100644
--- a/gnu/packages/backup.scm
+++ b/gnu/packages/backup.scm
@@ -148,7 +148,8 @@ backups (called chunks) to allow easy burning to CD/DVD.")
        (patches
         (list (search-patch "libarchive-mtree-filename-length-fix.patch")
               (search-patch "libarchive-fix-lzo-test-case.patch")
-              (search-patch "libarchive-CVE-2013-0211.patch")))))
+              (search-patch "libarchive-CVE-2013-0211.patch")
+              (search-patch "libarchive-bsdtar-test.patch")))))
     (build-system gnu-build-system)
     ;; TODO: Add -L/path/to/nettle in libarchive.pc.
     (inputs
diff --git a/gnu/packages/base.scm b/gnu/packages/base.scm
index 61eeba3cee..f8ea80b5e7 100644
--- a/gnu/packages/base.scm
+++ b/gnu/packages/base.scm
@@ -1,10 +1,11 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2014 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2012 Nikita Karetnikov <nikita@karetnikov.org>
 ;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2014 Alex Kost <alezost@gmail.com>
 ;;; Copyright © 2014, 2015 Manolis Fragkiskos Ragkousis <manolis837@gmail.com>
+;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -73,16 +74,18 @@ command-line arguments, multiple languages, and so on.")
 (define-public grep
   (package
    (name "grep")
-   (version "2.21")
+   (version "2.22")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnu/grep/grep-"
                                 version ".tar.xz"))
             (sha256
              (base32
-              "1pp5n15qwxrw1pibwjhhgsibyv5cafhamf8lwzjygs6y00fa2i2j"))
-            (patches (list (search-patch "grep-CVE-2015-1345.patch")))))
+              "1srn321x7whlhs5ks36zlcrrmj4iahll8fxwsh1vbz3v04px54fa"))
+            (patches
+             (list (search-patch "grep-timing-sensitive-test.patch")))))
    (build-system gnu-build-system)
+   (native-inputs `(("perl" ,perl)))             ;some of the tests require it
    (synopsis "Print lines matching a pattern")
    (description
      "grep is a tool for finding text inside files.  Text is found by
@@ -206,17 +209,17 @@ interactive means to merge two files.")
 (define-public findutils
   (package
    (name "findutils")
-   (version "4.4.2")
+   (version "4.6.0")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnu/findutils/findutils-"
                                 version ".tar.gz"))
             (sha256
              (base32
-              "0amn0bbwqvsvvsh6drfwz20ydc2czk374lzw5kksbh6bf78k4ks3"))
+              "178nn4dl7wbcw499czikirnkniwnx36argdnqgz4ik9i6zvwkm6y"))
             (patches (map search-patch
-                          '("findutils-absolute-paths.patch"
-                            "findutils-localstatedir.patch")))))
+                          '("findutils-localstatedir.patch"
+                            "findutils-test-xargs.patch")))))
    (build-system gnu-build-system)
    (arguments
     `(#:configure-flags (list
@@ -595,6 +598,15 @@ store.")
                          (string-append "#define _PATH_BSHELL \""
                                         bash "/bin/bash\"\n")))
 
+                      ;; Nscd uses __DATE__ and __TIME__ to create a string to
+                      ;; make sure the client and server come from the same
+                      ;; libc.  Use something deterministic instead.
+                      (substitute* "nscd/nscd_stat.c"
+                        (("static const char compilation\\[21\\] =.*$")
+                         (string-append
+                          "static const char compilation[21] = \""
+                          (string-take (basename out) 20) "\";\n")))
+
                       ;; Make sure we don't retain a reference to the
                       ;; bootstrap Perl.
                       (substitute* "malloc/mtrace.pl"
@@ -862,7 +874,7 @@ command.")
 (define-public tzdata
   (package
     (name "tzdata")
-    (version "2015c")
+    (version "2015g")
     (source (origin
              (method url-fetch)
              (uri (string-append
@@ -870,7 +882,7 @@ command.")
                    version ".tar.gz"))
              (sha256
               (base32
-               "0nin48g5dmkfgckp25bngxchn3sw3yyjss5sq7gs5xspbxgsq3w6"))))
+               "0qb1awqrn3215zd2jikpqnmkzrxwfjf0d3dw2xmnk4c40yzws8xr"))))
     (build-system gnu-build-system)
     (arguments
      '(#:tests? #f
@@ -917,7 +929,7 @@ command.")
                                 version ".tar.gz"))
                           (sha256
                            (base32
-                            "0bplibiy70dvlrhwqzkzxgmg81j6d2kklvjgi2f1g2zz1nkb3vkz"))))))
+                            "1i3y1kzjiz2j62c7vd4wf85983sqk9x9lg3473njvbdz4kph5r0q"))))))
     (home-page "http://www.iana.org/time-zones")
     (synopsis "Database of current and historical time zones")
     (description "The Time Zone Database (often called tz or zoneinfo)
diff --git a/gnu/packages/bash.scm b/gnu/packages/bash.scm
index bdb5a760f7..15909c7e88 100644
--- a/gnu/packages/bash.scm
+++ b/gnu/packages/bash.scm
@@ -1,6 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
+;;; Copyright © 2015 Leo Famulari <leo@famulari.name>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -92,7 +93,11 @@
    (36 "0z6jbyy70lfdm6d3x0sbazbqdxb3xnpn9bmz7madpvrnbd284pxc")
    (37 "04sqr8zkl6s5fccfvb775ppn3ldij5imria9swc39aq0fkfp1w9k")
    (38 "0rv3g14mpgv8br267bf7rmgqlgwnc4v6g3g8y0sjba571i8amgmd")
-   (39 "1v3l3vkc3g2b6fjycqwlakr8xhiw6bmw6q0zd6bi0m0m4bnxr55b")))
+   (39 "1v3l3vkc3g2b6fjycqwlakr8xhiw6bmw6q0zd6bi0m0m4bnxr55b")
+   (40 "0sypv66vsldmc95gwvf7ylz1k7y37vnvdsjg8ajjr6b2j9mkkfw4")
+   (41 "06ic2gdpbi1afik3wqf9d4vh95if4bz8bmhcgr555621dsb35i2f")
+   (42 "06a90k0p6bqc4wk2dsmapna69124an76xvlnlj3xm497vci968dc")))
+
 (define (download-patches store count)
   "Download COUNT Bash patches into store.  Return a list of
 number/base32-hash tuples, directly usable in the 'patch-series' form."
@@ -143,17 +148,18 @@ number/base32-hash tuples, directly usable in the 'patch-series' form."
              ;; guile-bash expect.
              (let ((include (string-append (assoc-ref outputs "include")
                                             "/include/bash"))
+                   (includes "^\\./include/[^/]+\\.h$")
                    (headers "^\\./(builtins/|lib/glob/|lib/tilde/|)[^/]+\\.h$"))
                (mkdir-p include)
                (for-each (lambda (file)
-                           (when ((@ (ice-9 regex) string-match) headers file)
-                             (let ((directory (string-append include "/"
-                                                             (dirname file))))
-                               (mkdir-p directory)
-                               (copy-file file
-                                          (string-append directory "/"
-                                                         (basename file))))))
+                           (when (string-match includes file)
+                             (install-file file include))
+                           (when (string-match headers file)
+                             (install-file file
+                                           (string-append include "/"
+                                                          (dirname file)))))
                          (find-files "." "\\.h$"))
+               (delete-file (string-append include "/" "y.tab.h"))
                #t)))
          (version "4.3"))
     (package
@@ -177,8 +183,9 @@ number/base32-hash tuples, directly usable in the 'patch-series' form."
      (build-system gnu-build-system)
 
      (outputs '("out"
-                "include"))                       ;headers used by extensions
-     (native-inputs `(("bison" ,bison)))          ;to rebuild the parser
+                "doc"                         ;1.7 MiB of HTML and extra files
+                "include"))                   ;headers used by extensions
+     (native-inputs `(("bison" ,bison)))      ;to rebuild the parser
      (inputs `(("readline" ,readline)
                ("ncurses" ,ncurses)))             ;TODO: add texinfo
      (arguments
@@ -199,10 +206,14 @@ number/base32-hash tuples, directly usable in the 'patch-series' form."
         ;; for now.
         #:tests? #f
 
+        #:modules ((ice-9 regex)
+                   (guix build utils)
+                   (guix build gnu-build-system))
+
         #:phases (modify-phases %standard-phases
                    (add-after 'install 'post-install ,post-install-phase)
                    (add-after 'install 'install-headers
-                              ,install-headers-phase))))
+                     ,install-headers-phase))))
      (synopsis "The GNU Bourne-Again SHell")
      (description
       "Bash is the shell, or command-line interpreter, of the GNU system.  It
diff --git a/gnu/packages/bdw-gc.scm b/gnu/packages/bdw-gc.scm
index f4bbc64569..992a11bac0 100644
--- a/gnu/packages/bdw-gc.scm
+++ b/gnu/packages/bdw-gc.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2014 Mark H Weaver <mhw@netris.org>
 ;;;
 ;;; This file is part of GNU Guix.
@@ -39,7 +39,9 @@
    (arguments
     ;; Make it so that we don't rely on /proc.  This is especially useful in
     ;; an initrd run before /proc is mounted.
-    '(#:configure-flags '("CPPFLAGS=-DUSE_LIBC_PRIVATES")))
+    '(#:configure-flags '("CPPFLAGS=-DUSE_LIBC_PRIVATES"
+                          ;; Install gc_cpp.h et al.
+                          "--enable-cplusplus")))
    (outputs '("out" "debug"))
    (synopsis "The Boehm-Demers-Weiser conservative garbage collector
 for C and C++")
@@ -103,11 +105,4 @@ lock-free code, experiment with thread programming paradigms, etc.")
     (inputs `(("libatomic-ops" ,libatomic-ops)))
 
     ;; 'USE_LIBC_PRIVATES' is now the default.
-    (arguments '())))
-
-;;; TODO: Remove this package once libgc is updated from core-updates.
-(define-public libgc-for-c++
-  (package (inherit libgc)
-    (name "libgc-cxx")
-    (arguments
-     '(#:configure-flags '("--enable-cplusplus"))))) ;install gc_cpp.h et al.
+    (arguments '(#:configure-flags '("--enable-cplusplus")))))
diff --git a/gnu/packages/cmake.scm b/gnu/packages/cmake.scm
index 2efce6fd87..d75b9f62ef 100644
--- a/gnu/packages/cmake.scm
+++ b/gnu/packages/cmake.scm
@@ -77,7 +77,7 @@ archive_write_set_format_shar.c"
                     ;; Help cmake's bootstrap process to find system libraries
                     (begin
                       (setenv "CMAKE_LIBRARY_PATH" (getenv "LIBRARY_PATH"))
-                      (setenv "CMAKE_INCLUDE_PATH" (getenv "CPATH"))
+                      (setenv "CMAKE_INCLUDE_PATH" (getenv "C_INCLUDE_PATH"))
                       ;; Get verbose output from failed tests
                       (setenv "CTEST_OUTPUT_ON_FAILURE" "TRUE")))
                   (alist-replace
diff --git a/gnu/packages/commencement.scm b/gnu/packages/commencement.scm
index 73b27a290a..1928360e2e 100644
--- a/gnu/packages/commencement.scm
+++ b/gnu/packages/commencement.scm
@@ -92,12 +92,15 @@
                                             ,@%bootstrap-inputs)
                                           #:guile %bootstrap-guile)))
      (package (inherit p)
+       (name "diffutils-boot0")
        (arguments `(#:tests? #f         ; the test suite needs diffutils
                     ,@(package-arguments p)))))))
 
 (define findutils-boot0
   (package-with-bootstrap-guile
-   (package-with-explicit-inputs findutils
+   (package-with-explicit-inputs (package
+                                   (inherit findutils)
+                                   (name "findutils-boot0"))
                                  `(("make" ,gnu-make-boot0)
                                    ("diffutils" ,diffutils-boot0) ; for tests
                                    ,@%bootstrap-inputs)
@@ -106,7 +109,9 @@
 
 (define file-boot0
   (package-with-bootstrap-guile
-   (package-with-explicit-inputs file
+   (package-with-explicit-inputs (package
+                                   (inherit file)
+                                   (name "file-boot0"))
                                  `(("make" ,gnu-make-boot0)
                                    ,@%bootstrap-inputs)
                                  (current-source-location)
@@ -204,7 +209,8 @@
                             "--disable-libssp"
                             "--disable-libquadmath"
                             "--disable-decimal-float")
-                      (remove (cut string-match "--enable-languages.*" <>)
+                      (remove (cut string-match
+                                "--(with-system-zlib|enable-languages.*)" <>)
                               ,flags)))
             ((#:phases phases)
              `(alist-cons-after
@@ -230,7 +236,7 @@
                                         (package-full-name lib)
                                         char-set:letter)
                                       ,(package-name lib)))
-                          (list gmp mpfr mpc))))
+                          (list gmp-6.0 mpfr mpc))))
                (alist-cons-after
                 'install 'symlink-libgcc_eh
                 (lambda* (#:key outputs #:allow-other-keys)
@@ -244,7 +250,7 @@
                       (symlink "libgcc.a" "libgcc_eh.a"))))
                 ,phases))))))
 
-     (inputs `(("gmp-source" ,(package-source gmp))
+     (inputs `(("gmp-source" ,(package-source gmp-6.0))
                ("mpfr-source" ,(package-source mpfr))
                ("mpc-source" ,(package-source mpc))
                ("binutils-cross" ,binutils-boot0)
@@ -259,11 +265,25 @@
                                   (package-native-inputs gcc))))))
 
 (define perl-boot0
-  (package-with-bootstrap-guile
-   (package-with-explicit-inputs perl
-                                 %boot0-inputs
-                                 (current-source-location)
-                                 #:guile %bootstrap-guile)))
+  (let ((perl (package
+                (inherit perl)
+                (name "perl-boot0")
+                (arguments
+                 (substitute-keyword-arguments (package-arguments perl)
+                   ((#:phases phases)
+                    `(modify-phases ,phases
+                       ;; Pthread support is missing in the bootstrap compiler
+                       ;; (broken spec file), so disable it.
+                       (add-before 'configure 'disable-pthreads
+                         (lambda _
+                           (substitute* "Configure"
+                             (("^libswanted=(.*)pthread" _ before)
+                              (string-append "libswanted=" before))))))))))))
+   (package-with-bootstrap-guile
+    (package-with-explicit-inputs perl
+                                  %boot0-inputs
+                                  (current-source-location)
+                                  #:guile %bootstrap-guile))))
 
 (define (linux-libre-headers-boot0)
   "Return Linux-Libre header files for the bootstrap environment."
@@ -285,7 +305,7 @@
   ;; Also, use %BOOT0-INPUTS to avoid building Perl once more.
   (let ((texinfo (package (inherit texinfo)
                    (native-inputs '())
-                   (inputs (alist-delete "ncurses" (package-inputs texinfo))))))
+                   (inputs `(("perl" ,perl-boot0))))))
     (package-with-bootstrap-guile
      (package-with-explicit-inputs texinfo %boot0-inputs
                                    (current-source-location)
@@ -409,14 +429,22 @@ exec ~a/bin/~a-~a -B~a/lib -Wl,-dynamic-linker -Wl,~a/~a \"$@\"~%"
                                                (current-source-location)
                                                #:guile %bootstrap-guile)))
          (bison (package (inherit bison)
-                  (native-inputs `(("perl" ,perl-boot0)))
                   (propagated-inputs `(("m4" ,m4)))
                   (inputs '())                    ;remove Flex...
-                  (arguments '(#:tests? #f)))))   ;... and thus disable tests
-   (package-with-bootstrap-guile
-    (package-with-explicit-inputs bison %boot0-inputs
-                                  (current-source-location)
-                                  #:guile %bootstrap-guile))))
+                  (arguments
+                   '(#:tests? #f                  ;... and thus disable tests
+
+                     ;; Zero timestamps in liby.a; this must be done
+                     ;; explicitly here because the bootstrap Binutils don't
+                     ;; do that (default is "cru".)
+                     #:make-flags '("ARFLAGS=crD" "RANLIB=ranlib -D"
+                                    "V=1"))))))
+    (package
+      (inherit (package-with-bootstrap-guile
+                (package-with-explicit-inputs bison %boot0-inputs
+                                              (current-source-location)
+                                              #:guile %bootstrap-guile)))
+      (native-inputs `(("perl" ,perl-boot0))))))
 
 (define static-bash-for-glibc
   ;; A statically-linked Bash to be used by GLIBC-FINAL in system(3) & co.
@@ -424,18 +452,19 @@ exec ~a/bin/~a-~a -B~a/lib -Wl,-dynamic-linker -Wl,~a/~a \"$@\"~%"
                                   glibc-final-with-bootstrap-bash
                                   (car (assoc-ref %boot1-inputs "bash"))))
          (bash (package (inherit static-bash)
-                 (native-inputs `(("bison" ,bison-boot1)))
                  (arguments
                   `(#:guile ,%bootstrap-guile
-                    ,@(package-arguments static-bash))))))
-    (package-with-bootstrap-guile
-     (package-with-explicit-inputs bash
-                                   `(("gcc" ,gcc)
-                                     ("libc" ,glibc-final-with-bootstrap-bash)
-                                     ,@(fold alist-delete %boot1-inputs
-                                             '("gcc" "libc")))
-                                   (current-source-location)
-                                   #:guile %bootstrap-guile))))
+                    ,@(package-arguments static-bash)))))
+         (inputs `(("gcc" ,gcc)
+                   ("libc" ,glibc-final-with-bootstrap-bash)
+                   ,@(fold alist-delete %boot1-inputs
+                           '("gcc" "libc")))))
+    (package
+      (inherit (package-with-bootstrap-guile
+                (package-with-explicit-inputs bash inputs
+                                              (current-source-location)
+                                              #:guile %bootstrap-guile)))
+      (native-inputs `(("bison" ,bison-boot1))))))
 
 (define gettext-boot0
   ;; A minimal gettext used during bootstrap.
@@ -527,7 +556,7 @@ exec ~a/bin/~a-~a -B~a/lib -Wl,-dynamic-linker -Wl,~a/~a \"$@\"~%"
      (arguments
       `(#:guile ,%bootstrap-guile
         #:implicit-inputs? #f
-
+        #:allowed-references ("out")
         #:out-of-source? #t
         #:phases (alist-cons-before
                   'configure 'chdir
@@ -549,6 +578,25 @@ exec ~a/bin/~a-~a -B~a/lib -Wl,-dynamic-linker -Wl,~a/~a \"$@\"~%"
      (propagated-inputs '())
      (synopsis "GNU C++ standard library (intermediate)"))))
 
+(define zlib-final
+  ;; Zlib used by GCC-FINAL.
+  (package-with-bootstrap-guile
+   (package
+     (inherit zlib)
+     (arguments
+      `(#:guile ,%bootstrap-guile
+        #:implicit-inputs? #f
+        #:allowed-references ("out" ,glibc-final)
+        ,@(package-arguments zlib)))
+     (inputs %boot2-inputs))))
+
+(define ld-wrapper-boot3
+  ;; A linker wrapper that uses the bootstrap Guile.
+  (make-ld-wrapper "ld-wrapper-boot3"
+                   #:binutils binutils-final
+                   #:guile %bootstrap-guile
+                   #:bash (car (assoc-ref %boot2-inputs "bash"))))
+
 (define gcc-final
   ;; The final GCC.
   (package (inherit gcc-boot0)
@@ -563,7 +611,7 @@ exec ~a/bin/~a-~a -B~a/lib -Wl,-dynamic-linker -Wl,~a/~a \"$@\"~%"
      `(#:guile ,%bootstrap-guile
        #:implicit-inputs? #f
 
-       #:allowed-references ("out" "lib"
+       #:allowed-references ("out" "lib" ,zlib-final
                              ,glibc-final ,static-bash-for-glibc)
 
        ;; Things like libasan.so and libstdc++.so NEED ld.so for some
@@ -583,18 +631,16 @@ exec ~a/bin/~a-~a -B~a/lib -Wl,-dynamic-linker -Wl,~a/~a \"$@\"~%"
                 ((_ rest ...)
                  (loop rest)))))
            ((#:make-flags flags)
-            ;; Since $LIBRARY_PATH and $CPATH are not honored, add the
-            ;; relevant flags.
-            `(cons (string-append "CPPFLAGS=-I"
-                                  (assoc-ref %build-inputs "libstdc++")
-                                  "/include")
-                   (map (lambda (flag)
-                          (if (string-prefix? "LDFLAGS=" flag)
-                              (string-append flag " -L"
-                                             (assoc-ref %build-inputs "libstdc++")
-                                             "/lib")
-                              flag))
-                        ,flags)))
+            ;; Since $LIBRARY_PATH is not honored, add the relevant flags.
+            `(let ((zlib (assoc-ref %build-inputs "zlib")))
+               (map (lambda (flag)
+                      (if (string-prefix? "LDFLAGS=" flag)
+                          (string-append flag " -L"
+                                         (assoc-ref %build-inputs "libstdc++")
+                                         "/lib -L" zlib "/lib -Wl,-rpath="
+                                         zlib "/lib")
+                          flag))
+                    ,flags)))
            ((#:phases phases)
             `(alist-delete 'symlink-libgcc_eh ,phases)))))
 
@@ -606,20 +652,15 @@ exec ~a/bin/~a-~a -B~a/lib -Wl,-dynamic-linker -Wl,~a/~a \"$@\"~%"
                      ("static-bash" ,static-bash-for-glibc)
                      ,@(package-native-inputs gcc-boot0)))
 
-    (inputs `(("gmp-source" ,(bootstrap-origin (package-source gmp)))
+    (inputs `(("gmp-source" ,(bootstrap-origin (package-source gmp-6.0)))
               ("mpfr-source" ,(package-source mpfr))
               ("mpc-source" ,(package-source mpc))
+              ("ld-wrapper" ,ld-wrapper-boot3)
               ("binutils" ,binutils-final)
               ("libstdc++" ,libstdc++)
+              ("zlib" ,zlib-final)
               ,@%boot2-inputs))))
 
-(define ld-wrapper-boot3
-  ;; A linker wrapper that uses the bootstrap Guile.
-  (make-ld-wrapper "ld-wrapper-boot3"
-                   #:binutils binutils-final
-                   #:guile %bootstrap-guile
-                   #:bash (car (assoc-ref %boot2-inputs "bash"))))
-
 (define %boot3-inputs
   ;; 4th stage inputs.
   `(("gcc" ,gcc-final)
@@ -629,11 +670,13 @@ exec ~a/bin/~a-~a -B~a/lib -Wl,-dynamic-linker -Wl,~a/~a \"$@\"~%"
 (define bash-final
   ;; Link with `-static-libgcc' to make sure we don't retain a reference
   ;; to the bootstrap GCC.
-  (package-with-bootstrap-guile
-   (package-with-explicit-inputs (static-libgcc-package bash)
-                                 %boot3-inputs
-                                 (current-source-location)
-                                 #:guile %bootstrap-guile)))
+  (package
+    (inherit (package-with-bootstrap-guile
+              (package-with-explicit-inputs (static-libgcc-package bash)
+                                            %boot3-inputs
+                                            (current-source-location)
+                                            #:guile %bootstrap-guile)))
+    (native-inputs `(("bison" ,bison-boot1)))))
 
 (define %boot4-inputs
   ;; Now use the final Bash.
@@ -703,7 +746,9 @@ exec ~a/bin/~a-~a -B~a/lib -Wl,-dynamic-linker -Wl,~a/~a \"$@\"~%"
   ;; The final grep.  Gzip holds a reference to it (via zgrep), so it must be
   ;; built before gzip.
   (package-with-bootstrap-guile
-   (package-with-explicit-inputs grep
+   (package-with-explicit-inputs (package
+                                   (inherit grep)
+                                   (native-inputs `(("perl" ,perl-boot0))))
                                  %boot5-inputs
                                  (current-source-location)
                                  #:guile guile-final)))
diff --git a/gnu/packages/compression.scm b/gnu/packages/compression.scm
index fd3a9ce98e..7d22095df1 100644
--- a/gnu/packages/compression.scm
+++ b/gnu/packages/compression.scm
@@ -7,7 +7,7 @@
 ;;; Copyright © 2015 Ricardo Wurmus <rekado@elephly.net>
 ;;; Copyright © 2015 Leo Famulari <leo@famulari.name>
 ;;; Copyright © 2015 Jeff Mickey <j@codemac.net>
-;;; Copyright © 2015 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2015, 2016 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -40,7 +40,7 @@
 (define-public zlib
   (package
     (name "zlib")
-    (version "1.2.7")
+    (version "1.2.8")
     (source
      (origin
       (method url-fetch)
@@ -50,7 +50,7 @@
                                  version ".tar.gz")))
       (sha256
        (base32
-        "1i96gsdvxqb6skp9a58bacf1wxamwi9m9pg4yn7cpf7g7239r77s"))))
+        "039agw5rqvqny92cpkrfn243x2gd4xn13hs3xi6isk55d2vqqr9n"))))
     (build-system gnu-build-system)
     (arguments
      `(#:phases (alist-replace
@@ -260,7 +260,7 @@ compressed with pbzip2 can be decompressed with bzip2).")
 (define-public xz
   (package
    (name "xz")
-   (version "5.0.4")
+   (version "5.2.2")
    (source (origin
             (method url-fetch)
             (uri (list (string-append "http://tukaani.org/xz/xz-" version
@@ -269,7 +269,7 @@ compressed with pbzip2 can be decompressed with bzip2).")
                                       version ".tar.gz")))
             (sha256
              (base32
-              "1dl35ca8fdss9z2d6y234gxh24ixq904xksizrjmjr5dimwhax6n"))))
+              "18h2k4jndhzjs8ln3a54qdnfv59y6spxiwh9gpaqniph6iflvpvk"))))
    (build-system gnu-build-system)
    (synopsis "General-purpose data compression")
    (description
diff --git a/gnu/packages/cross-base.scm b/gnu/packages/cross-base.scm
index d64cdd1272..cefe2f947f 100644
--- a/gnu/packages/cross-base.scm
+++ b/gnu/packages/cross-base.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
 ;;;
 ;;; This file is part of GNU Guix.
@@ -181,12 +181,14 @@ may be either a libc package or #f.)"
                             (string-append libc "/lib"))
 
                     (let ((cpath   (search-path-as-string->list
-                                    (getenv "CPATH")))
+                                    (getenv "C_INCLUDE_PATH")))
                           (libpath (search-path-as-string->list
                                     (getenv "LIBRARY_PATH"))))
                       (setenv "CPATH"
                               (list->search-path-as-string
                                (remove cross? cpath) ":"))
+                      (for-each unsetenv
+                                '("C_INCLUDE_PATH" "CPLUS_INCLUDE_PATH"))
                       (setenv "LIBRARY_PATH"
                               (list->search-path-as-string
                                (remove cross? libpath) ":"))
diff --git a/gnu/packages/databases.scm b/gnu/packages/databases.scm
index 5cac48d081..4bb3b4d1e2 100644
--- a/gnu/packages/databases.scm
+++ b/gnu/packages/databases.scm
@@ -6,6 +6,8 @@
 ;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2015 Eric Bavier <bavier@member.fsf.org>
 ;;; Copyright © 2015 Sou Bunnbu <iyzsong@gmail.com>
+;;; Copyright © 2015 Leo Famulari <leo@famulari.name>
+;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -24,6 +26,7 @@
 
 (define-module (gnu packages databases)
   #:use-module (gnu packages)
+  #:use-module (gnu packages bash)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages language)
   #:use-module (gnu packages linux)
@@ -308,16 +311,18 @@ pictures, sounds, or video.")
 
     ;; Running tests in parallel leads to test failures and crashes in
     ;; torture/utils.
-    (arguments '(#:parallel-tests? #f))
+    (arguments '(#:parallel-tests? #f
+                 #:configure-flags
+                 (list (string-append "--with-bash-headers="
+                                      (assoc-ref %build-inputs "bash:include")
+                                      "/include/bash"))))
 
     (native-inputs `(("emacs" ,emacs-no-x)
                      ("bc" ,bc)
+                     ("bash:include" ,bash "include")
                      ("libuuid", util-linux)))
 
     ;; TODO: Add more optional inputs.
-    ;; FIXME: Our Bash doesn't have development headers (need for the 'readrec'
-    ;; built-in command), but it's not clear how to get them installed.
-    ;; See <https://lists.gnu.org/archive/html/bug-bash/2014-03/msg00125.html>.
     (inputs `(("curl" ,curl)
               ("libgcrypt" ,libgcrypt)
               ("check" ,check)))
@@ -334,7 +339,7 @@ types are supported, as is encryption.")
 (define-public sqlite
   (package
    (name "sqlite")
-   (version "3.8.11.1")
+   (version "3.10.0")
    (source (origin
             (method url-fetch)
             ;; TODO: Download from sqlite.org once this bug :
@@ -365,7 +370,7 @@ types are supported, as is encryption.")
                    ))
             (sha256
              (base32
-              "1dnkl4qr1dgaprbyf3jddfiynkhxnin86qabni47wjlc0fnb16gv"))))
+              "0hhhv6si0pyf5i8bv7a71953m0b4gk6s3j2h09caf7vif0njkk23"))))
    (build-system gnu-build-system)
    (inputs `(("readline" ,readline)))
    (arguments
diff --git a/gnu/packages/emacs.scm b/gnu/packages/emacs.scm
index e82ffd33a7..ba7bd49901 100644
--- a/gnu/packages/emacs.scm
+++ b/gnu/packages/emacs.scm
@@ -70,7 +70,8 @@
              (sha256
               (base32
                "0kn3rzm91qiswi0cql89kbv6mqn27rwsyjfb8xmwy9m5s8fxfiyx"))
-             (patches (list (search-patch "emacs-exec-path.patch")))))
+             (patches (list (search-patch "emacs-exec-path.patch")
+                            (search-patch "emacs-source-date-epoch.patch")))))
     (build-system glib-or-gtk-build-system)
     (arguments
      '(#:phases (modify-phases %standard-phases
diff --git a/gnu/packages/file.scm b/gnu/packages/file.scm
index 161df544de..90e9a70626 100644
--- a/gnu/packages/file.scm
+++ b/gnu/packages/file.scm
@@ -27,14 +27,14 @@
 (define-public file
   (package
    (name "file")
-    (version "5.22")
+    (version "5.25")
     (source (origin
               (method url-fetch)
               (uri (string-append "ftp://ftp.astron.com/pub/file/file-"
                                   version ".tar.gz"))
               (sha256
                (base32
-                "02zw14hw3gqlw91w2f2snbirvyrp7r83irvnnkjcb25q9kjaiqy4"))))
+                "1jhfi5mivdnqvry5la5q919l503ahwdwbf3hjhiv97znccakhd9p"))))
    (build-system gnu-build-system)
 
    ;; When cross-compiling, this package depends upon a native install of
diff --git a/gnu/packages/flex.scm b/gnu/packages/flex.scm
index 7988e930e7..f8d5ccd032 100644
--- a/gnu/packages/flex.scm
+++ b/gnu/packages/flex.scm
@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -31,15 +32,14 @@
 (define flex
   (package
     (name "flex")
-    (version "2.5.37")
+    (version "2.6.0")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/flex/flex-"
                                  version ".tar.bz2"))
              (sha256
               (base32
-               "0ah5mi4j62b85a9rllv1004mzjb5cd0mn4glvz13p88rpx77pahp"))
-             (patches (list (search-patch "flex-bison-tests.patch")))))
+               "1sdqx63yadindzafrq1w31ajblf9gl1c301g068s20s7bbpi3ri4"))))
     (build-system gnu-build-system)
     (inputs
      (let ((bison-for-tests
diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm
index 2848e4343a..832e57bc77 100644
--- a/gnu/packages/gcc.scm
+++ b/gnu/packages/gcc.scm
@@ -99,6 +99,7 @@ where the OS part is overloaded to denote a specific ABI---into GCC
                    '("--enable-plugin"
                      "--enable-languages=c,c++"
                      "--disable-multilib"
+                     "--with-system-zlib"
 
                      ;; No pre-compiled libstdc++ headers, to save space.
                      "--disable-libstdcxx-pch"
@@ -293,8 +294,16 @@ where the OS part is overloaded to denote a specific ABI---into GCC
            %standard-phases))))
 
       (native-search-paths
+       ;; Use the language-specific variables rather than 'CPATH' because they
+       ;; are equivalent to '-isystem' whereas 'CPATH' is equivalent to '-I'.
+       ;; The intent is to allow headers that are in the search path to be
+       ;; treated as "system headers" (headers exempt from warnings) just like
+       ;; the typical /usr/include headers on an FHS system.
        (list (search-path-specification
-              (variable "CPATH")
+              (variable "C_INCLUDE_PATH")
+              (files '("include")))
+             (search-path-specification
+              (variable "CPLUS_INCLUDE_PATH")
               (files '("include")))
              (search-path-specification
               (variable "LIBRARY_PATH")
@@ -408,13 +417,18 @@ using compilers other than GCC."
 (define-public libiberty
   (make-libiberty gcc))
 
-(define* (custom-gcc gcc name languages #:key (separate-lib-output? #t))
-  "Return a custom version of GCC that supports LANGUAGES."
+(define* (custom-gcc gcc name languages
+                     #:optional
+                     (search-paths (package-native-search-paths gcc))
+                     #:key (separate-lib-output? #t))
+  "Return a custom version of GCC that supports LANGUAGES.  Use SEARCH-PATHS
+as the 'native-search-paths' field."
   (package (inherit gcc)
     (name name)
     (outputs (if separate-lib-output?
                  (package-outputs gcc)
                  (delete "lib" (package-outputs gcc))))
+    (native-search-paths search-paths)
     (arguments
      (substitute-keyword-arguments `(#:modules ((guix build gnu-build-system)
                                                 (guix build utils)
@@ -428,20 +442,37 @@ using compilers other than GCC."
                (remove (cut string-match "--enable-languages.*" <>)
                        ,flags)))))))
 
+(define %generic-search-paths
+  ;; This is the language-neutral search path for GCC.  Entries in $CPATH are
+  ;; not considered "system headers", which means GCC can raise warnings for
+  ;; issues in those headers.  'CPATH' is the only one that works for
+  ;; front-ends not in the C family.
+  (list (search-path-specification
+         (variable "CPATH")
+         (files '("include")))
+        (search-path-specification
+         (variable "LIBRARY_PATH")
+         (files '("lib" "lib64")))))
+
 (define-public gfortran-4.8
-  (custom-gcc gcc-4.8 "gfortran" '("fortran")))
+  (custom-gcc gcc-4.8 "gfortran" '("fortran")
+              %generic-search-paths))
 
 (define-public gfortran-4.9
-  (custom-gcc gcc-4.9 "gfortran" '("fortran")))
+  (custom-gcc gcc-4.9 "gfortran" '("fortran")
+              %generic-search-paths))
 
 (define-public gfortran
-  (custom-gcc gcc "gfortran" '("fortran")))
+  (custom-gcc gcc "gfortran" '("fortran")
+              %generic-search-paths))
 
 (define-public gfortran-5
-  (custom-gcc gcc-5 "gfortran" '("fortran")))
+  (custom-gcc gcc-5 "gfortran" '("fortran")
+              %generic-search-paths))
 
 (define-public gccgo-4.8
   (custom-gcc gcc-4.8 "gccgo" '("go")
+              %generic-search-paths
               ;; Suppress the separate "lib" output, because otherwise the
               ;; "lib" and "out" outputs would refer to each other, creating
               ;; a cyclic dependency.  <http://debbugs.gnu.org/18101>
@@ -468,6 +499,8 @@ using compilers other than GCC."
     (native-inputs
      `(("dejagnu" ,dejagnu)
        ,@(package-native-inputs gcc)))
+    (native-search-paths %generic-search-paths)
+
     ;; Suppress the separate "lib" output, because otherwise the
     ;; "lib" and "out" outputs would refer to each other, creating
     ;; a cyclic dependency.  <http://debbugs.gnu.org/18101>
@@ -551,10 +584,22 @@ using compilers other than GCC."
       "1k9lgm3qamf6zy534pa2zwskr8mpiqrngbv1vw9j4y1ghrdyf1lm"))))
 
 (define-public gcc-objc-4.8
-  (custom-gcc gcc-4.8 "gcc-objc" '("objc")))
+  (custom-gcc gcc-4.8 "gcc-objc" '("objc")
+              (list (search-path-specification
+                     (variable "OBJC_INCLUDE_PATH")
+                     (files '("include")))
+                    (search-path-specification
+                     (variable "LIBRARY_PATH")
+                     (files '("lib" "lib64"))))))
 
 (define-public gcc-objc++-4.8
-  (custom-gcc gcc-4.8 "gcc-objc++" '("obj-c++")))
+  (custom-gcc gcc-4.8 "gcc-objc++" '("obj-c++")
+              (list (search-path-specification
+                     (variable "OBJCPLUS_INCLUDE_PATH")
+                     (files '("include")))
+                    (search-path-specification
+                     (variable "LIBRARY_PATH")
+                     (files '("lib" "lib64"))))))
 
 (define (make-libstdc++-doc gcc)
   "Return a package with the libstdc++ documentation for GCC."
diff --git a/gnu/packages/gettext.scm b/gnu/packages/gettext.scm
index 14dedc51b5..7cd1ab73e7 100644
--- a/gnu/packages/gettext.scm
+++ b/gnu/packages/gettext.scm
@@ -2,6 +2,7 @@
 ;;; Copyright © 2012 Nikita Karetnikov <nikita@karetnikov.org>
 ;;; Copyright © 2014 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2015 Ricardo Wurmus <rekado@elephly.net>
+;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -40,50 +41,51 @@
 (define-public gnu-gettext
   (package
     (name "gettext")
-    (version "0.19.6")
+    (version "0.19.7")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnu/gettext/gettext-"
                                  version ".tar.gz"))
              (sha256
               (base32
-               "0pb9vp4ifymvdmc31ks3xxcnfqgzj8shll39czmk8c1splclqjzd"))))
+               "0gy2b2aydj8r0sapadnjw8cmb8j2rynj28d5qs1mfa800njd51jk"))))
     (build-system gnu-build-system)
+    (outputs '("out"
+               "doc"))                            ;8 MiB of HTML
     (inputs
      `(("expat" ,expat)))
     (arguments
-     `(#:phases (alist-cons-before
-                 'check 'patch-tests
-                 (lambda* (#:key inputs #:allow-other-keys)
-                   (let* ((bash (which "sh")))
-                     ;; Some of the files we're patching are
-                     ;; ISO-8859-1-encoded, so choose it as the default
-                     ;; encoding so the byte encoding is preserved.
-                     (with-fluids ((%default-port-encoding #f))
-                       (substitute*
-                           (find-files "gettext-tools/tests"
-                                       "^(lang-sh|msg(exec|filter)-[0-9])")
-                         (("#![[:blank:]]/bin/sh")
-                          (format #f "#!~a" bash)))
+     `(#:phases
+       (modify-phases %standard-phases
+        (add-before 'check 'patch-tests
+         (lambda* (#:key inputs #:allow-other-keys)
+           (let* ((bash (which "sh")))
+             ;; Some of the files we're patching are
+             ;; ISO-8859-1-encoded, so choose it as the default
+             ;; encoding so the byte encoding is preserved.
+             (with-fluids ((%default-port-encoding #f))
+               (substitute*
+                   (find-files "gettext-tools/tests"
+                               "^(lang-sh|msg(exec|filter)-[0-9])")
+                 (("#![[:blank:]]/bin/sh")
+                  (format #f "#!~a" bash)))
 
-                       (substitute* (cons "gettext-tools/src/msginit.c"
-                                          (find-files "gettext-tools/gnulib-tests"
-                                                      "posix_spawn"))
-                         (("/bin/sh")
-                          bash))
+               (substitute* (cons "gettext-tools/src/msginit.c"
+                                  (find-files "gettext-tools/gnulib-tests"
+                                              "posix_spawn"))
+                 (("/bin/sh")
+                  bash))
 
-                       (substitute* "gettext-tools/src/project-id"
-                         (("/bin/pwd")
-                          "pwd")))))
-                 (alist-cons-before
-                  'configure 'link-expat
-                  (lambda _
-                    ;; Gettext defaults to opening expat via dlopen on
-                    ;; "Linux".  Change to link directly.
-                    (substitute* "gettext-tools/configure"
-                      (("LIBEXPAT=\"-ldl\"") "LIBEXPAT=\"-ldl -lexpat\"")
-                      (("LTLIBEXPAT=\"-ldl\"") "LTLIBEXPAT=\"-ldl -lexpat\"")))
-                  %standard-phases))
+               (substitute* "gettext-tools/src/project-id"
+                 (("/bin/pwd")
+                  "pwd"))))))
+        (add-before 'configure 'link-expat
+         (lambda _
+           ;; Gettext defaults to opening expat via dlopen on
+           ;; "Linux".  Change to link directly.
+           (substitute* "gettext-tools/configure"
+             (("LIBEXPAT=\"-ldl\"") "LIBEXPAT=\"-ldl -lexpat\"")
+             (("LTLIBEXPAT=\"-ldl\"") "LTLIBEXPAT=\"-ldl -lexpat\"")))))
 
        ;; When tests fail, we want to know the details.
        #:make-flags '("VERBOSE=yes")))
diff --git a/gnu/packages/glib.scm b/gnu/packages/glib.scm
index 146d3f563b..c5eea22845 100644
--- a/gnu/packages/glib.scm
+++ b/gnu/packages/glib.scm
@@ -251,10 +251,10 @@ dynamic loading, and an object system.")
        ("cairo" ,cairo)
        ("flex" ,flex)
        ("glib" ,glib)
-       ("pkg-config" ,pkg-config)
        ("python-2" ,python-2)))
     (native-inputs
-     `(("glib" ,glib "bin")))
+     `(("glib" ,glib "bin")
+       ("pkg-config" ,pkg-config)))
     (propagated-inputs
      `(;; In practice, GIR users will need libffi when using
        ;; gobject-introspection.
diff --git a/gnu/packages/gnupg.scm b/gnu/packages/gnupg.scm
index aeee440b7e..2042327d3d 100644
--- a/gnu/packages/gnupg.scm
+++ b/gnu/packages/gnupg.scm
@@ -4,7 +4,7 @@
 ;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
 ;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2015 Paul van der Walt <paul@denknerd.org>
-;;; Copyright © 2015 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2015, 2016 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -45,7 +45,7 @@
 (define-public libgpg-error
   (package
     (name "libgpg-error")
-    (version "1.19")
+    (version "1.21")
     (source
      (origin
       (method url-fetch)
@@ -53,7 +53,7 @@
                           version ".tar.bz2"))
       (sha256
        (base32
-        "12wpqhjlsw4iaanifbqm2kich6c7x7lm8a7zhy6x5ifm6c9hw4jk"))))
+        "0kdq2cbnk84fr4jqcv689rlxpbyl6bda2cn6y3ll19v3mlydpnxp"))))
     (build-system gnu-build-system)
     (home-page "http://gnupg.org")
     (synopsis "Library of error values for GnuPG components")
@@ -67,14 +67,14 @@ Daemon and possibly more in the future.")
 (define-public libgcrypt
   (package
     (name "libgcrypt")
-    (version "1.6.3")
+    (version "1.6.4")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnupg/libgcrypt/libgcrypt-"
                                  version ".tar.bz2"))
              (sha256
               (base32
-               "0pq2nwfqgggrsh8rk84659d80vfnlkbphwqjwahccd5fjdxr3d21"))))
+               "09k06gs27gxfha07sa9rpf4xh6mvphj9sky7n09ymx75w9zjrg69"))))
     (build-system gnu-build-system)
     (propagated-inputs
      `(("libgpg-error-host" ,libgpg-error)))
diff --git a/gnu/packages/guile.scm b/gnu/packages/guile.scm
index 4be237cd65..861a18fce8 100644
--- a/gnu/packages/guile.scm
+++ b/gnu/packages/guile.scm
@@ -174,7 +174,8 @@ without requiring the source code to be rewritten.")
            (files '("share/guile/site/2.0")))
           (search-path-specification
            (variable "GUILE_LOAD_COMPILED_PATH")
-           (files '("share/guile/site/2.0")))))
+           (files '("lib/guile/2.0/ccache"
+                    "share/guile/site/2.0")))))
 
    (synopsis "Scheme implementation intended especially for extensions")
    (description
diff --git a/gnu/packages/haskell.scm b/gnu/packages/haskell.scm
index 843a428dc6..c3e0a6100b 100644
--- a/gnu/packages/haskell.scm
+++ b/gnu/packages/haskell.scm
@@ -243,6 +243,12 @@
                    (string-append ghc-bootstrap-path "/ghc-7.8.4")
                  (zero? (system* "make" "install"))))
              %standard-phases)))))))
+    (native-search-paths (list (search-path-specification
+                                (variable "GHC_PACKAGE_PATH")
+                                (files (list
+                                        (string-append "lib/ghc-" version)))
+                                (file-pattern ".*\\.conf\\.d$")
+                                (file-type 'directory))))
     (home-page "https://www.haskell.org/ghc")
     (synopsis "The Glasgow Haskell Compiler")
     (description
diff --git a/gnu/packages/ld-wrapper.in b/gnu/packages/ld-wrapper.in
index c3d6fa1005..c92ed1dcc7 100644
--- a/gnu/packages/ld-wrapper.in
+++ b/gnu/packages/ld-wrapper.in
@@ -137,52 +137,61 @@ exec @GUILE@ -c "(load-compiled \"@SELF@.go\") (apply $main (cdr (command-line))
              (string-every (char-set-union (char-set #\.) char-set:digit)
                            (string-drop file (+ index 3)))))))
 
-(define (library-files-linked args)
-  ;; Return the file names of shared libraries explicitly linked against via
-  ;; `-l' or with an absolute file name in ARGS.
-  (define path+files+args
+(define (library-search-path args)
+  ;; Return the library search path as a list of directory names.  The GNU ld
+  ;; manual notes that "[a]ll `-L' options apply to all `-l' options,
+  ;; regardless of the order in which the options appear", so we must compute
+  ;; the search path independently of the -l options.
+  (let loop ((args args)
+             (path '()))
+    (match args
+      (()
+       (reverse path))
+      (("-L" directory . rest)
+       (loop rest (cons directory path)))
+      ((argument . rest)
+       (if (string-prefix? "-L" argument)         ;augment the search path
+           (loop rest
+                 (cons (string-drop argument 2) path))
+           (loop rest path))))))
+
+(define (library-files-linked args library-path)
+  ;; Return the absolute file names of shared libraries explicitly linked
+  ;; against via `-l' or with an absolute file name in ARGS, looking them up
+  ;; in LIBRARY-PATH.
+  (define files+args
     (fold (lambda (argument result)
             (match result
-              ((library-path library-files
-                             ((and flag
-                                   (or "-dynamic-linker" "-plugin"))
-                              . rest))
+              ((library-files ((and flag
+                                    (or "-dynamic-linker" "-plugin"))
+                               . rest))
                ;; When passed '-dynamic-linker ld.so', ignore 'ld.so'; when
                ;; passed '-plugin liblto_plugin.so', ignore
                ;; 'liblto_plugin.so'.  See <http://bugs.gnu.org/20102>.
-               (list library-path
-                     library-files
+               (list library-files
                      (cons* argument flag rest)))
-              ((library-path library-files previous-args)
-               (cond ((string-prefix? "-L" argument) ;augment the search path
-                      (list (append library-path
-                                    (list (string-drop argument 2)))
-                            library-files
-                            (cons argument previous-args)))
-                     ((string-prefix? "-l" argument) ;add library
+              ((library-files previous-args)
+               (cond ((string-prefix? "-l" argument) ;add library
                       (let* ((lib  (string-append "lib"
                                                   (string-drop argument 2)
                                                   ".so"))
                              (full (search-path library-path lib)))
-                        (list library-path
-                              (if full
+                        (list (if full
                                   (cons full library-files)
                                   library-files)
                               (cons argument previous-args))))
                      ((and (string-prefix? %store-directory argument)
                            (shared-library? argument)) ;add library
-                      (list library-path
-                            (cons argument library-files)
+                      (list (cons argument library-files)
                             (cons argument previous-args)))
                      (else
-                      (list library-path
-                            library-files
+                      (list library-files
                             (cons argument previous-args)))))))
-          (list '() '() '())
+          (list '() '())
           args))
 
-  (match path+files+args
-    ((path files arguments)
+  (match files+args
+    ((files arguments)
      (reverse files))))
 
 (define (rpath-arguments library-files)
@@ -211,10 +220,13 @@ impure library ~s~%"
 
 (define (ld-wrapper . args)
   ;; Invoke the real `ld' with ARGS, augmented with `-rpath' switches.
-  (let* ((libs (library-files-linked args))
+  (let* ((path (library-search-path args))
+         (libs (library-files-linked args path))
          (args (append args (rpath-arguments libs))))
     (when %debug?
       (format (current-error-port)
+              "ld-wrapper: library search path: ~s~%" path)
+      (format (current-error-port)
               "ld-wrapper: libraries linked: ~s~%" libs)
       (format (current-error-port)
               "ld-wrapper: invoking `~a' with ~s~%"
diff --git a/gnu/packages/libffi.scm b/gnu/packages/libffi.scm
index 33e10d6fc2..83af7fde68 100644
--- a/gnu/packages/libffi.scm
+++ b/gnu/packages/libffi.scm
@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -29,11 +30,11 @@
          ;; available in $includedir where some users expect them.
          '(lambda* (#:key outputs #:allow-other-keys)
             (define out (assoc-ref outputs "out"))
-            (symlink (string-append out "/lib/libffi-3.1/include")
+            (symlink (string-append out "/lib/libffi-3.2.1/include")
                      (string-append out "/include")))))
    (package
     (name "libffi")
-    (version "3.1")
+    (version "3.2.1")
     (source (origin
              (method url-fetch)
              (uri
@@ -41,7 +42,7 @@
                              name "-" version ".tar.gz"))
              (sha256
               (base32
-               "1sznmrhcswwbyqla9y2ximlkzbxks59wjfs3lh7qf8ayranyxzlp"))))
+               "0dya49bnhianl0r65m65xndz6ls2jn1xngyn72gd28ls3n7bnvnh"))))
     (build-system gnu-build-system)
     (arguments `(#:phases (alist-cons-after 'install 'post-install
                                             ,post-install-phase
diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index 779b9c85b8..7250cd5002 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -417,6 +417,9 @@ providing the system administrator with some help in common tasks.")
     (arguments
      `(#:configure-flags (list "--disable-use-tty-group"
 
+                               ;; Do not build .a files to save 2 MiB.
+                               "--disable-static"
+
                                ;; Install completions where our
                                ;; bash-completion package expects them.
                                (string-append "--with-bashcompletiondir="
@@ -462,62 +465,34 @@ block devices, UUIDs, TTYs, and many other tools.")
 (define-public procps
   (package
     (name "procps")
-    (version "3.2.8")
+    (version "3.3.11")
     (source (origin
-             (method url-fetch)
-             ;; A mirror://sourceforge URI doesn't work, presumably becuase
-             ;; the SourceForge project is misconfigured.
-             (uri (string-append "http://procps.sourceforge.net/procps-"
-                                 version ".tar.gz"))
-             (sha256
-              (base32
-               "0d8mki0q4yamnkk4533kx8mc0jd879573srxhg6r2fs3lkc6iv8i"))
-             (patches (list (search-patch "procps-make-3.82.patch")))))
+              (method url-fetch)
+              (uri (string-append "mirror://sourceforge/procps-ng/Production/"
+                                  "procps-ng-" version ".tar.xz"))
+              (sha256
+               (base32
+                "1va4n0mpsq327ca9dqp4hnrpgs6821rp0f2m0jyc1bfjl9lk2jg9"))))
     (build-system gnu-build-system)
-    (inputs `(("ncurses" ,ncurses)))
     (arguments
      '(#:modules ((guix build utils)
                   (guix build gnu-build-system)
                   (srfi srfi-1)
                   (srfi srfi-26))
-       #:phases (alist-replace
-                 'configure
-                 (lambda* (#:key outputs #:allow-other-keys)
-                   ;; No `configure', just a single Makefile.
-                   (let ((out (assoc-ref outputs "out")))
-                     (substitute* "Makefile"
-                       (("/usr/") "/")
-                       (("--(owner|group) 0") "")
-                       (("ldconfig") "true")
-                       (("^LDFLAGS[[:blank:]]*:=(.*)$" _ value)
-                        ;; Add libproc to the RPATH.
-                        (string-append "LDFLAGS := -Wl,-rpath="
-                                       out "/lib" value))))
-                   (setenv "CC" "gcc"))
-                 (alist-replace
-                  'install
-                  (lambda* (#:key outputs #:allow-other-keys)
-                    (let ((out (assoc-ref outputs "out")))
-                      (and (zero?
-                            (system* "make" "install"
-                                     (string-append "DESTDIR=" out)))
-
-                           ;; Remove commands and man pages redundant with
-                           ;; Coreutils.
-                           (let ((dup (append-map (cut find-files out <>)
-                                                  '("^kill" "^uptime"))))
-                             (for-each delete-file dup)
-                             #t)
-
-                           ;; Sanity check.
-                           (zero?
-                            (system* (string-append out "/bin/ps")
-                                     "--version")))))
-                  %standard-phases))
-
-       ;; What did you expect?  Tests?
-       #:tests? #f))
-    (home-page "http://procps.sourceforge.net/")
+       #:phases
+       (modify-phases %standard-phases
+         (add-after
+          'install 'post-install
+          ;; Remove commands and man pages redudant with
+          ;; Coreutils.
+          (lambda* (#:key outputs #:allow-other-keys)
+            (let* ((out (assoc-ref outputs "out"))
+                   (dup (append-map (cut find-files out <>)
+                                    '("^kill" "^uptime"))))
+              (for-each delete-file dup)
+              #t))))))
+    (inputs `(("ncurses" ,ncurses)))
+    (home-page "https://gitlab.com/procps-ng/procps/")
     (synopsis "Utilities that give information about processes")
     (description
      "Procps is the package that has a bunch of small useful utilities
diff --git a/gnu/packages/multiprecision.scm b/gnu/packages/multiprecision.scm
index ee74c03700..ad507706db 100644
--- a/gnu/packages/multiprecision.scm
+++ b/gnu/packages/multiprecision.scm
@@ -30,7 +30,7 @@
 (define-public gmp
   (package
    (name "gmp")
-   (version "6.0.0a")
+   (version "6.1.0")
    (source (origin
             (method url-fetch)
             (uri
@@ -38,14 +38,14 @@
                             version ".tar.xz"))
             (sha256
              (base32
-              "0r5pp27cy7ch3dg5v0rsny8bib1zfvrza6027g2mp5f6v8pd6mli"))
+              "12b9s4jn48gbar6dbs5qrlmljdmnq43xy3ji9yjzic0mwp6dmnk8"))
             (patches (map search-patch
-                          '("gmp-arm-asm-nothumb.patch"
-                            "gmp-faulty-test.patch")))))
+                          '("gmp-faulty-test.patch")))))
    (build-system gnu-build-system)
    (native-inputs `(("m4" ,m4)))
    (outputs '("out" "debug"))
-   (arguments `(#:configure-flags
+   (arguments `(#:parallel-tests? #f ; mpz/reuse fails otherwise
+                #:configure-flags
                 '(;; Build a "fat binary", with routines for several
                   ;; sub-architectures.
                   "--enable-fat"
@@ -60,6 +60,24 @@ cryptography and computational algebra.")
    (license lgpl3+)
    (home-page "http://gmplib.org/")))
 
+(define-public gmp-6.0
+  ;; We keep this one around to bootstrap GCC, to work around a compilation
+  ;; issue on ARM.  See
+  ;; <https://gmplib.org/list-archives/gmp-bugs/2015-December/003848.html>.
+  (package
+    (inherit gmp)
+    (version "6.0.0a")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://gnu/gmp/gmp-"
+                                  version ".tar.xz"))
+              (sha256
+               (base32
+                "0r5pp27cy7ch3dg5v0rsny8bib1zfvrza6027g2mp5f6v8pd6mli"))
+              (patches (map search-patch
+                            '("gmp-arm-asm-nothumb.patch"
+                              "gmp-faulty-test.patch")))))))
+
 (define-public mpfr
   (package
    (name "mpfr")
diff --git a/gnu/packages/ncurses.scm b/gnu/packages/ncurses.scm
index b7fbfc982d..147033a7e5 100644
--- a/gnu/packages/ncurses.scm
+++ b/gnu/packages/ncurses.scm
@@ -29,16 +29,35 @@
          '(lambda _
             (for-each patch-makefile-SHELL
                       (find-files "." "Makefile.in"))))
+        (configure-phase
+         ;; The 'configure' script does not understand '--docdir', so we must
+         ;; override that and use '--mandir' instead.
+         '(lambda* (#:key build target outputs configure-flags
+                    #:allow-other-keys)
+            (let ((out (assoc-ref outputs "out"))
+                  (doc (assoc-ref outputs "doc")))
+              (zero? (apply system* "./configure"
+                            (string-append "SHELL=" (which "sh"))
+                            (string-append "--build=" build)
+                            (string-append "--prefix=" out)
+                            (string-append "--mandir=" doc "/share/man")
+                            (if target
+                                (cons (string-append "--host=" target)
+                                      configure-flags)
+                                configure-flags))))))
         (remove-shebang-phase
          '(lambda _
             ;; To avoid retaining a reference to the bootstrap Bash via the
-            ;; shebang of the 'ncursesw5-config' script, simply remove that
-            ;; shebang: it'll work just as well without it.
+            ;; shebang of the 'ncursesw6-config' script, simply remove that
+            ;; shebang: it'll work just as well without it.  Likewise, do not
+            ;; retain a reference to the "doc" output.
             (substitute* "misc/ncurses-config.in"
               (("#!@SHELL@")
                "# No shebang here, use /bin/sh!\n")
               (("@SHELL@ \\$0")
-               "$0"))
+               "$0")
+              (("mandir=.*$")
+               "mandir=share/man"))
             #t))
         (post-install-phase
          '(lambda* (#:key outputs #:allow-other-keys)
@@ -79,6 +98,8 @@
                (base32
                 "0q3jck7lna77z5r42f13c4xglc7azd19pxfrjrpgp2yf615w4lgm"))))
      (build-system gnu-build-system)
+     (outputs '("out"
+                "doc"))                          ;1 MiB of man pages
      (arguments
       `(#:configure-flags
         `("--with-shared" "--without-debug" "--enable-widec"
@@ -95,13 +116,18 @@
                           "/lib"))
         #:tests? #f                               ; no "check" target
         #:phases (modify-phases %standard-phases
+                   (replace 'configure ,configure-phase)
                    (add-after 'install 'post-install
-                              ,post-install-phase)
+                     ,post-install-phase)
                    (add-before 'configure 'patch-makefile-SHELL
-                               ,patch-makefile-phase)
+                     ,patch-makefile-phase)
                    (add-after 'unpack 'remove-unneeded-shebang
-                              ,remove-shebang-phase))))
+                     ,remove-shebang-phase))))
      (self-native-input? #t)                      ; for `tic'
+     (native-search-paths
+      (list (search-path-specification
+             (variable "TERMINFO_DIRS")
+             (files '("share/terminfo")))))
      (synopsis "Terminal emulation (termcap, terminfo) library")
      (description
       "GNU Ncurses is a library which provides capabilities to write text to
diff --git a/gnu/packages/package-management.scm b/gnu/packages/package-management.scm
index f157d1513b..b85ebece3c 100644
--- a/gnu/packages/package-management.scm
+++ b/gnu/packages/package-management.scm
@@ -340,7 +340,7 @@ symlinks to the files in a common directory such as /usr/local.")
                       (let ((nspr (assoc-ref inputs "nspr"))
                             (nss  (assoc-ref inputs "nss")))
                         (setenv "CPATH"
-                                (string-append (getenv "CPATH") ":"
+                                (string-append (getenv "C_INCLUDE_PATH") ":"
                                                nspr "/include/nspr:"
                                                nss "/include/nss"))
                         (setenv "LIBRARY_PATH"
diff --git a/gnu/packages/patches/emacs-source-date-epoch.patch b/gnu/packages/patches/emacs-source-date-epoch.patch
new file mode 100644
index 0000000000..41c03ef514
--- /dev/null
+++ b/gnu/packages/patches/emacs-source-date-epoch.patch
@@ -0,0 +1,20 @@
+Honor SOURCE_DATE_EPOCH variable to avoid non-determinism in generated
+"autoloads" files.
+
+--- a/lisp/emacs-lisp/autoload.el
++++ b/lisp/emacs-lisp/autoload.el
+@@ -378,8 +378,12 @@
+   "Insert the section-header line,
+ which lists the file name and which functions are in it, etc."
+   (insert generate-autoload-section-header)
+-  (prin1 `(autoloads ,autoloads ,load-name ,file ,time)
+-	 outbuf)
++  (let* ((env  (getenv "SOURCE_DATE_EPOCH"))
++         (time (if env
++                   (seconds-to-time (string-to-number env))
++                 time)))
++    (prin1 `(autoloads ,autoloads ,load-name ,file ,time)
++           outbuf))
+   (terpri outbuf)
+   ;; Break that line at spaces, to avoid very long lines.
+   ;; Make each sub-line into a comment.
diff --git a/gnu/packages/patches/findutils-absolute-paths.patch b/gnu/packages/patches/findutils-absolute-paths.patch
deleted file mode 100644
index 96341e281f..0000000000
--- a/gnu/packages/patches/findutils-absolute-paths.patch
+++ /dev/null
@@ -1,29 +0,0 @@
-Fix use of LFS-style absolute paths.
-
-Patches from Nixpkgs by Armijn Hemel <armijn@gpl-violations.org>
-and Wouter den Breejen <uu@denbreejen.net>.
-
-diff -ruN findutils-4.2.20/locate/updatedb.sh findutils-4.2.20.new/locate/updatedb.sh
---- findutils-4.2.20/locate/updatedb.sh	2005-01-24 17:12:35.000000000 +0100
-+++ findutils-4.2.20.new/locate/updatedb.sh	2005-08-23 14:37:10.000000000 +0200
-@@ -141,7 +141,7 @@
- : ${code:=${LIBEXECDIR}/@code@}
- 
- 
--PATH=/bin:/usr/bin:${BINDIR}; export PATH
-+PATH=/bin:/usr/bin:${BINDIR}:${PATH}; export PATH
- 
- : ${PRUNEFS="nfs NFS proc afs proc smbfs autofs iso9660 ncpfs coda devpts ftpfs devfs mfs sysfs shfs"}
- 
-diff -Naur findutils-4.2.30/xargs/xargs.c findutils-4.2.30_new/xargs/xargs.c
---- findutils-4.2.30/xargs/xargs.c	2007-02-27 11:21:08.000000000 +0100
-+++ findutils-4.2.30_new/xargs/xargs.c	2007-07-17 19:02:05.000000000 +0200
-@@ -402,7 +402,7 @@
-   int show_limits = 0;			/* --show-limits */
-   int always_run_command = 1;
-   char *input_file = "-"; /* "-" is stdin */
--  char *default_cmd = "/bin/echo";
-+  char *default_cmd = "echo";
-   int (*read_args) PARAMS ((void)) = read_line;
-   void (*act_on_init_result)(void) = noop;
-   int env_too_big = 0;
diff --git a/gnu/packages/patches/findutils-test-xargs.patch b/gnu/packages/patches/findutils-test-xargs.patch
new file mode 100644
index 0000000000..10c7bed28d
--- /dev/null
+++ b/gnu/packages/patches/findutils-test-xargs.patch
@@ -0,0 +1,22 @@
+This test relies on 'xargs' being available in $PATH, which is not
+the case when we build the initial Findutils doing bootstrapping.
+Reported at <https://savannah.gnu.org/bugs/index.php?46786>.
+
+--- findutils-4.6.0/find/testsuite/sv-34976-execdir-fd-leak.sh	2015-12-31 19:37:59.401526288 +0100
++++ findutils-4.6.0/find/testsuite/sv-34976-execdir-fd-leak.sh	2015-12-31 19:38:36.061770693 +0100
+@@ -50,13 +50,14 @@ die() {
+ # Create test files, each 98 in the directories ".", "one" and "two".
+ make_test_data() {
+   d="$1"
++  xargs="`cd ../../xargs; pwd -P`/xargs"
+   (
+     cd "$1" || exit 1
+     mkdir one two || exit 1
+     for i in ${three_to_hundred} ; do
+       printf "./%03d one/%03d two/%03d " $i $i $i
+     done \
+-      | xargs touch || exit 1
++      | "$xargs" touch || exit 1
+   ) \
+   || die "failed to set up the test in ${outdir}"
+ }
diff --git a/gnu/packages/patches/flex-bison-tests.patch b/gnu/packages/patches/flex-bison-tests.patch
deleted file mode 100644
index 0f372f83bf..0000000000
--- a/gnu/packages/patches/flex-bison-tests.patch
+++ /dev/null
@@ -1,24 +0,0 @@
-The `test-bison-yyl{loc,val}' tests fail with "conflicting types for
-'testparse'" because `YYPARSE_PARAM' is undefined; work around that.
-
---- flex-2.5.37/tests/test-bison-yylloc/main.c	2012-11-22 18:17:01.000000000 +0100
-+++ flex-2.5.37/tests/test-bison-yylloc/main.c	2012-11-22 18:17:07.000000000 +0100
-@@ -21,6 +21,7 @@
-  * PURPOSE.
-  */
- 
-+#define YYPARSE_PARAM scanner
- #include "parser.h"
- #include "scanner.h"
- 
-
---- flex-2.5.37/tests/test-bison-yylval/main.c	2012-11-22 18:17:42.000000000 +0100
-+++ flex-2.5.37/tests/test-bison-yylval/main.c	2012-11-22 18:17:49.000000000 +0100
-@@ -21,6 +21,7 @@
-  * PURPOSE.
-  */
- 
-+#define YYPARSE_PARAM scanner
- #include "parser.h"
- #include "scanner.h"
- 
diff --git a/gnu/packages/patches/gnutls-doc-fix.patch b/gnu/packages/patches/gnutls-doc-fix.patch
deleted file mode 100644
index 170d2468bc..0000000000
--- a/gnu/packages/patches/gnutls-doc-fix.patch
+++ /dev/null
@@ -1,546 +0,0 @@
-diff -ru gnutls-3.4.4/doc/invoke-certtool.texi gnutls-3.4.4.1/doc/invoke-certtool.texi
---- gnutls-3.4.4.1/doc/invoke-certtool.texi	2015-08-10 13:43:52.000000000 -0400
-+++ gnutls-3.4.4/doc/invoke-certtool.texi	2015-07-31 15:44:21.000000000 -0400
-@@ -41,7 +41,97 @@
- 
- @exampleindent 0
- @example
--certtool is unavailable - no --help
-+certtool - GnuTLS certificate tool
-+Usage:  certtool [ -<flag> [<val>] | --<name>[@{=| @}<val>] ]...
-+
-+   -d, --debug=num            Enable debugging
-+                                - it must be in the range:
-+                                  0 to 9999
-+   -V, --verbose              More verbose output
-+                                - may appear multiple times
-+       --infile=file          Input file
-+                                - file must pre-exist
-+       --outfile=str          Output file
-+   -s, --generate-self-signed  Generate a self-signed certificate
-+   -c, --generate-certificate  Generate a signed certificate
-+       --generate-proxy       Generates a proxy certificate
-+       --generate-crl         Generate a CRL
-+   -u, --update-certificate   Update a signed certificate
-+   -p, --generate-privkey     Generate a private key
-+   -q, --generate-request     Generate a PKCS #10 certificate request
-+                                - prohibits the option 'infile'
-+   -e, --verify-chain         Verify a PEM encoded certificate chain
-+       --verify               Verify a PEM encoded certificate chain using a trusted list
-+       --verify-crl           Verify a CRL using a trusted list
-+                                - requires the option 'load-ca-certificate'
-+       --generate-dh-params   Generate PKCS #3 encoded Diffie-Hellman parameters
-+       --get-dh-params        Get the included PKCS #3 encoded Diffie-Hellman parameters
-+       --dh-info              Print information PKCS #3 encoded Diffie-Hellman parameters
-+       --load-privkey=str     Loads a private key file
-+       --load-pubkey=str      Loads a public key file
-+       --load-request=str     Loads a certificate request file
-+       --load-certificate=str Loads a certificate file
-+       --load-ca-privkey=str  Loads the certificate authority's private key file
-+       --load-ca-certificate=str Loads the certificate authority's certificate file
-+       --password=str         Password to use
-+       --null-password        Enforce a NULL password
-+       --empty-password       Enforce an empty password
-+       --hex-numbers          Print big number in an easier format to parse
-+       --cprint               In certain operations it prints the information in C-friendly format
-+   -i, --certificate-info     Print information on the given certificate
-+       --certificate-pubkey   Print certificate's public key
-+       --pgp-certificate-info  Print information on the given OpenPGP certificate
-+       --pgp-ring-info        Print information on the given OpenPGP keyring structure
-+   -l, --crl-info             Print information on the given CRL structure
-+       --crq-info             Print information on the given certificate request
-+       --no-crq-extensions    Do not use extensions in certificate requests
-+       --p12-info             Print information on a PKCS #12 structure
-+       --p12-name=str         The PKCS #12 friendly name to use
-+       --p7-info              Print information on a PKCS #7 structure
-+       --smime-to-p7          Convert S/MIME to PKCS #7 structure
-+   -k, --key-info             Print information on a private key
-+       --pgp-key-info         Print information on an OpenPGP private key
-+       --pubkey-info          Print information on a public key
-+       --v1                   Generate an X.509 version 1 certificate (with no extensions)
-+   -!, --to-p12               Generate a PKCS #12 structure
-+                                - requires the option 'load-certificate'
-+   -", --to-p8                Generate a PKCS #8 structure
-+   -8, --pkcs8                Use PKCS #8 format for private keys
-+   -#, --rsa                  Generate RSA key
-+   -$, --dsa                  Generate DSA key
-+   -%, --ecc                  Generate ECC (ECDSA) key
-+   -&, --ecdsa                an alias for the 'ecc' option
-+   -', --hash=str             Hash algorithm to use for signing
-+   -(, --inder                Use DER format for input certificates, private keys, and DH parameters
-+                                - disabled as '--no-inder'
-+   -), --inraw                an alias for the 'inder' option
-+   -*, --outder               Use DER format for output certificates, private keys, and DH parameters
-+                                - disabled as '--no-outder'
-+   -+, --outraw               an alias for the 'outder' option
-+   -,, --bits=num             Specify the number of bits for key generate
-+   --, --curve=str            Specify the curve used for EC key generation
-+   -., --sec-param=str        Specify the security level [low, legacy, medium, high, ultra]
-+   -/, --disable-quick-random  No effect
-+   -0, --template=str         Template file to use for non-interactive operation
-+   -1, --stdout-info          Print information to stdout instead of stderr
-+   -2, --ask-pass             Enable interaction for entering password when in batch mode.
-+   -3, --pkcs-cipher=str      Cipher to use for PKCS #8 and #12 operations
-+   -4, --provider=str         Specify the PKCS #11 provider library
-+   -v, --version[=arg]        output version information and exit
-+   -h, --help                 display extended usage information and exit
-+   -!, --more-help            extended usage information passed thru pager
-+
-+Options are specified by doubled hyphens and their name or by a single
-+hyphen and the flag character.
-+
-+Tool to parse and generate X.509 certificates, requests and private keys.
-+It can be used interactively or non interactively by specifying the
-+template command line option.
-+
-+The tool accepts files or URLs supported by GnuTLS.  In case PIN is
-+required for the URL access you can provide it using the environment
-+variables GNUTLS_PIN and GNUTLS_SO_PIN.
-+
- @end example
- @exampleindent 4
- 
-diff -ru gnutls-3.4.4/doc/invoke-gnutls-cli-debug.texi gnutls-3.4.4.1/doc/invoke-gnutls-cli-debug.texi
---- gnutls-3.4.4.1/doc/invoke-gnutls-cli-debug.texi	2015-08-10 13:43:50.000000000 -0400
-+++ gnutls-3.4.4/doc/invoke-gnutls-cli-debug.texi	2015-07-31 15:44:18.000000000 -0400
-@@ -40,7 +40,34 @@
- 
- @exampleindent 0
- @example
--gnutls-cli-debug is unavailable - no --help
-+gnutls-cli-debug - GnuTLS debug client
-+Usage:  gnutls-cli-debug [ -<flag> [<val>] | --<name>[@{=| @}<val>] ]... 
-+
-+   -d, --debug=num            Enable debugging
-+                                - it must be in the range:
-+                                  0 to 9999
-+   -V, --verbose              More verbose output
-+                                - may appear multiple times
-+   -p, --port=num             The port to connect to
-+                                - it must be in the range:
-+                                  0 to 65536
-+       --app-proto=str        The application protocol to be used to obtain the server's certificate
-+(https, ftp, smtp, imap)
-+   -v, --version[=arg]        output version information and exit
-+   -h, --help                 display extended usage information and exit
-+   -!, --more-help            extended usage information passed thru pager
-+
-+Options are specified by doubled hyphens and their name or by a single
-+hyphen and the flag character.
-+Operands and options may be intermixed.  They will be reordered.
-+
-+TLS debug client.  It sets up multiple TLS connections to a server and
-+queries its capabilities.  It was created to assist in debugging GnuTLS,
-+but it might be useful to extract a TLS server's capabilities.  It connects
-+to a TLS server, performs tests and print the server's capabilities.  If
-+called with the `-v' parameter more checks will be performed.  Can be used
-+to check for servers with special needs or bugs.
-+
- @end example
- @exampleindent 4
- 
-diff -ru gnutls-3.4.4/doc/invoke-gnutls-cli.texi gnutls-3.4.4.1/doc/invoke-gnutls-cli.texi
---- gnutls-3.4.4.1/doc/invoke-gnutls-cli.texi	2015-08-10 13:43:49.000000000 -0400
-+++ gnutls-3.4.4/doc/invoke-gnutls-cli.texi	2015-07-31 15:44:17.000000000 -0400
-@@ -36,7 +36,95 @@
- 
- @exampleindent 0
- @example
--gnutls-cli is unavailable - no --help
-+gnutls-cli - GnuTLS client
-+Usage:  gnutls-cli [ -<flag> [<val>] | --<name>[@{=| @}<val>] ]... [hostname]
-+
-+   -d, --debug=num            Enable debugging
-+                                - it must be in the range:
-+                                  0 to 9999
-+   -V, --verbose              More verbose output
-+                                - may appear multiple times
-+       --tofu                 Enable trust on first use authentication
-+                                - disabled as '--no-tofu'
-+       --strict-tofu          Fail to connect if a known certificate has changed
-+                                - disabled as '--no-strict-tofu'
-+       --dane                 Enable DANE certificate verification (DNSSEC)
-+                                - disabled as '--no-dane'
-+       --local-dns            Use the local DNS server for DNSSEC resolving
-+                                - disabled as '--no-local-dns'
-+       --ca-verification      Disable CA certificate verification
-+                                - disabled as '--no-ca-verification'
-+                                - enabled by default
-+       --ocsp                 Enable OCSP certificate verification
-+                                - disabled as '--no-ocsp'
-+   -r, --resume               Establish a session and resume
-+   -e, --rehandshake          Establish a session and rehandshake
-+   -s, --starttls             Connect, establish a plain session and start TLS
-+       --app-proto=str        an alias for the 'starttls-proto' option
-+       --starttls-proto=str   The application protocol to be used to obtain the server's certificate
-+(https, ftp, smtp, imap)
-+                                - prohibits the option 'starttls'
-+   -u, --udp                  Use DTLS (datagram TLS) over UDP
-+       --mtu=num              Set MTU for datagram TLS
-+                                - it must be in the range:
-+                                  0 to 17000
-+       --crlf                 Send CR LF instead of LF
-+       --x509fmtder           Use DER format for certificates to read from
-+   -f, --fingerprint          Send the openpgp fingerprint, instead of the key
-+       --print-cert           Print peer's certificate in PEM format
-+       --dh-bits=num          The minimum number of bits allowed for DH
-+       --priority=str         Priorities string
-+       --x509cafile=str       Certificate file or PKCS #11 URL to use
-+       --x509crlfile=file     CRL file to use
-+                                - file must pre-exist
-+       --pgpkeyfile=file      PGP Key file to use
-+                                - file must pre-exist
-+       --pgpkeyring=file      PGP Key ring file to use
-+                                - file must pre-exist
-+       --pgpcertfile=file     PGP Public Key (certificate) file to use
-+                                - file must pre-exist
-+       --x509keyfile=str      X.509 key file or PKCS #11 URL to use
-+       --x509certfile=str     X.509 Certificate file or PKCS #11 URL to use
-+       --pgpsubkey=str        PGP subkey to use (hex or auto)
-+       --srpusername=str      SRP username to use
-+       --srppasswd=str        SRP password to use
-+       --pskusername=str      PSK username to use
-+       --pskkey=str           PSK key (in hex) to use
-+   -p, --port=str             The port or service to connect to
-+       --insecure             Don't abort program if server certificate can't be validated
-+       --ranges               Use length-hiding padding to prevent traffic analysis
-+       --benchmark-ciphers    Benchmark individual ciphers
-+       --benchmark-tls-kx     Benchmark TLS key exchange methods
-+       --benchmark-tls-ciphers  Benchmark TLS ciphers
-+   -l, --list                 Print a list of the supported algorithms and modes
-+                                - prohibits the option 'port'
-+       --noticket             Don't allow session tickets
-+   -!, --srtp-profiles=str    Offer SRTP profiles
-+   -", --alpn=str             Application layer protocol
-+                                - may appear multiple times
-+   -b, --heartbeat            Activate heartbeat support
-+   -#, --recordsize=num       The maximum record size to advertize
-+                                - it must be in the range:
-+                                  0 to 4096
-+   -$, --disable-sni          Do not send a Server Name Indication (SNI)
-+   -%, --disable-extensions   Disable all the TLS extensions
-+   -&, --inline-commands      Inline commands of the form ^<cmd>^
-+   -', --inline-commands-prefix=str Change the default delimiter for inline commands.
-+   -(, --provider=file        Specify the PKCS #11 provider library
-+                                - file must pre-exist
-+   -), --fips140-mode         Reports the status of the FIPS140-2 mode in gnutls library
-+   -v, --version[=arg]        output version information and exit
-+   -h, --help                 display extended usage information and exit
-+   -!, --more-help            extended usage information passed thru pager
-+
-+Options are specified by doubled hyphens and their name or by a single
-+hyphen and the flag character.
-+Operands and options may be intermixed.  They will be reordered.
-+
-+Simple client program to set up a TLS connection to some other computer.  It
-+sets up a TLS connection and forwards data from the standard input to the
-+secured socket and vice versa.
-+
- @end example
- @exampleindent 4
- 
-diff -ru gnutls-3.4.4/doc/invoke-gnutls-serv.texi gnutls-3.4.4.1/doc/invoke-gnutls-serv.texi
---- gnutls-3.4.4.1/doc/invoke-gnutls-serv.texi	2015-08-10 13:43:51.000000000 -0400
-+++ gnutls-3.4.4/doc/invoke-gnutls-serv.texi	2015-07-31 15:44:20.000000000 -0400
-@@ -35,7 +35,69 @@
- 
- @exampleindent 0
- @example
--gnutls-serv is unavailable - no --help
-+gnutls-serv - GnuTLS server
-+Usage:  gnutls-serv [ -<flag> [<val>] | --<name>[@{=| @}<val>] ]...
-+
-+   -d, --debug=num            Enable debugging
-+                                - it must be in the range:
-+                                  0 to 9999
-+       --noticket             Don't accept session tickets
-+   -g, --generate             Generate Diffie-Hellman and RSA-export parameters
-+   -q, --quiet                Suppress some messages
-+       --nodb                 Do not use a resumption database
-+       --http                 Act as an HTTP server
-+       --echo                 Act as an Echo server
-+   -u, --udp                  Use DTLS (datagram TLS) over UDP
-+       --mtu=num              Set MTU for datagram TLS
-+                                - it must be in the range:
-+                                  0 to 17000
-+       --srtp-profiles=str    Offer SRTP profiles
-+   -a, --disable-client-cert  Do not request a client certificate
-+   -r, --require-client-cert  Require a client certificate
-+       --verify-client-cert   If a client certificate is sent then verify it.
-+   -b, --heartbeat            Activate heartbeat support
-+       --x509fmtder           Use DER format for certificates to read from
-+       --priority=str         Priorities string
-+       --dhparams=file        DH params file to use
-+                                - file must pre-exist
-+       --x509cafile=str       Certificate file or PKCS #11 URL to use
-+       --x509crlfile=file     CRL file to use
-+                                - file must pre-exist
-+       --pgpkeyfile=file      PGP Key file to use
-+                                - file must pre-exist
-+       --pgpkeyring=file      PGP Key ring file to use
-+                                - file must pre-exist
-+       --pgpcertfile=file     PGP Public Key (certificate) file to use
-+                                - file must pre-exist
-+       --x509keyfile=str      X.509 key file or PKCS #11 URL to use
-+       --x509certfile=str     X.509 Certificate file or PKCS #11 URL to use
-+       --x509dsakeyfile=str   Alternative X.509 key file or PKCS #11 URL to use
-+       --x509dsacertfile=str  Alternative X.509 Certificate file or PKCS #11 URL to use
-+       --x509ecckeyfile=str   Alternative X.509 key file or PKCS #11 URL to use
-+       --x509ecccertfile=str  Alternative X.509 Certificate file or PKCS #11 URL to use
-+       --pgpsubkey=str        PGP subkey to use (hex or auto)
-+       --srppasswd=file       SRP password file to use
-+                                - file must pre-exist
-+       --srppasswdconf=file   SRP password configuration file to use
-+                                - file must pre-exist
-+       --pskpasswd=file       PSK password file to use
-+                                - file must pre-exist
-+       --pskhint=str          PSK identity hint to use
-+       --ocsp-response=file   The OCSP response to send to client
-+                                - file must pre-exist
-+   -p, --port=num             The port to connect to
-+   -l, --list                 Print a list of the supported algorithms and modes
-+       --provider=file        Specify the PKCS #11 provider library
-+                                - file must pre-exist
-+   -v, --version[=arg]        output version information and exit
-+   -h, --help                 display extended usage information and exit
-+   -!, --more-help            extended usage information passed thru pager
-+
-+Options are specified by doubled hyphens and their name or by a single
-+hyphen and the flag character.
-+
-+Server program that listens to incoming TLS connections.
-+
- @end example
- @exampleindent 4
- 
-diff -ru gnutls-3.4.4/doc/invoke-ocsptool.texi gnutls-3.4.4.1/doc/invoke-ocsptool.texi
---- gnutls-3.4.4.1/doc/invoke-ocsptool.texi	2015-08-10 13:43:53.000000000 -0400
-+++ gnutls-3.4.4/doc/invoke-ocsptool.texi	2015-07-31 15:44:22.000000000 -0400
-@@ -37,7 +37,53 @@
- 
- @exampleindent 0
- @example
--ocsptool is unavailable - no --help
-+ocsptool - GnuTLS OCSP tool
-+Usage:  ocsptool [ -<flag> [<val>] | --<name>[@{=| @}<val>] ]...
-+
-+   -d, --debug=num            Enable debugging
-+                                - it must be in the range:
-+                                  0 to 9999
-+   -V, --verbose              More verbose output
-+                                - may appear multiple times
-+       --infile=file          Input file
-+                                - file must pre-exist
-+       --outfile=str          Output file
-+       --ask[=arg]            Ask an OCSP/HTTP server on a certificate validity
-+                                - requires these options:
-+                                load-cert
-+                                load-issuer
-+   -e, --verify-response      Verify response
-+   -i, --request-info         Print information on a OCSP request
-+   -j, --response-info        Print information on a OCSP response
-+   -q, --generate-request     Generate an OCSP request
-+       --nonce                Use (or not) a nonce to OCSP request
-+                                - disabled as '--no-nonce'
-+       --load-issuer=file     Read issuer certificate from file
-+                                - file must pre-exist
-+       --load-cert=file       Read certificate to check from file
-+                                - file must pre-exist
-+       --load-trust=file      Read OCSP trust anchors from file
-+                                - prohibits the option 'load-signer'
-+                                - file must pre-exist
-+       --load-signer=file     Read OCSP response signer from file
-+                                - prohibits the option 'load-trust'
-+                                - file must pre-exist
-+       --inder                Use DER format for input certificates and private keys
-+                                - disabled as '--no-inder'
-+   -Q, --load-request=file    Read DER encoded OCSP request from file
-+                                - file must pre-exist
-+   -S, --load-response=file   Read DER encoded OCSP response from file
-+                                - file must pre-exist
-+   -v, --version[=arg]        output version information and exit
-+   -h, --help                 display extended usage information and exit
-+   -!, --more-help            extended usage information passed thru pager
-+
-+Options are specified by doubled hyphens and their name or by a single
-+hyphen and the flag character.
-+
-+Ocsptool is a program that can parse and print information about OCSP
-+requests/responses, generate requests and verify responses.
-+
- @end example
- @exampleindent 4
- 
-diff -ru gnutls-3.4.4/doc/invoke-p11tool.texi gnutls-3.4.4.1/doc/invoke-p11tool.texi
---- gnutls-3.4.4.1/doc/invoke-p11tool.texi	2015-08-10 13:43:58.000000000 -0400
-+++ gnutls-3.4.4/doc/invoke-p11tool.texi	2015-07-31 15:44:26.000000000 -0400
-@@ -45,7 +45,97 @@
- 
- @exampleindent 0
- @example
--p11tool is unavailable - no --help
-+p11tool - GnuTLS PKCS #11 tool
-+Usage:  p11tool [ -<flag> [<val>] | --<name>[@{=| @}<val>] ]... [url]
-+
-+   -d, --debug=num            Enable debugging
-+                                - it must be in the range:
-+                                  0 to 9999
-+       --outfile=str          Output file
-+       --list-tokens          List all available tokens
-+       --export               Export the object specified by the URL
-+       --export-chain         Export the certificate specified by the URL and its chain of trust
-+       --list-mechanisms      List all available mechanisms in a token
-+       --info                 List information on an available object in a token
-+       --list-all             List all available objects in a token
-+       --list-all-certs       List all available certificates in a token
-+       --list-certs           List all certificates that have an associated private key
-+       --list-all-privkeys    List all available private keys in a token
-+       --list-privkeys        an alias for the 'list-all-privkeys' option
-+       --list-keys            an alias for the 'list-all-privkeys' option
-+       --list-all-trusted     List all available certificates marked as trusted
-+       --write                Writes the loaded objects to a PKCS #11 token
-+       --delete               Deletes the objects matching the PKCS #11 URL
-+       --generate-random=num  Generate random data
-+       --generate-rsa         Generate an RSA private-public key pair
-+       --generate-dsa         Generate an RSA private-public key pair
-+       --generate-ecc         Generate an RSA private-public key pair
-+       --export-pubkey        Export the public key for a private key
-+       --label=str            Sets a label for the write operation
-+       --mark-wrap            Marks the generated key to be a wrapping key
-+                                - disabled as '--no-mark-wrap'
-+       --mark-trusted         Marks the object to be written as trusted
-+                                - disabled as '--no-mark-trusted'
-+       --mark-ca              Marks the object to be written as a CA
-+                                - disabled as '--no-mark-ca'
-+       --mark-private         Marks the object to be written as private
-+                                - disabled as '--no-mark-private'
-+                                - enabled by default
-+       --trusted              an alias for the 'mark-trusted' option
-+       --ca                   an alias for the 'mark-ca' option
-+       --private              an alias for the 'mark-private' option
-+                                - enabled by default
-+       --login                Force (user) login to token
-+                                - disabled as '--no-login'
-+       --so-login             Force security officer login to token
-+                                - disabled as '--no-so-login'
-+       --admin-login          an alias for the 'so-login' option
-+       --detailed-url         Print detailed URLs
-+                                - disabled as '--no-detailed-url'
-+   -!, --secret-key=str       Provide a hex encoded secret key
-+   -", --load-privkey=file    Private key file to use
-+                                - file must pre-exist
-+   -#, --load-pubkey=file     Public key file to use
-+                                - file must pre-exist
-+   -$, --load-certificate=file Certificate file to use
-+                                - file must pre-exist
-+   -8, --pkcs8                Use PKCS #8 format for private keys
-+   -%, --bits=num             Specify the number of bits for key generate
-+   -&, --curve=str            Specify the curve used for EC key generation
-+   -', --sec-param=str        Specify the security level
-+   -(, --inder                Use DER/RAW format for input
-+                                - disabled as '--no-inder'
-+   -), --inraw                an alias for the 'inder' option
-+   -*, --outder               Use DER format for output certificates, private keys, and DH parameters
-+                                - disabled as '--no-outder'
-+   -+, --outraw               an alias for the 'outder' option
-+   -,, --initialize           Initializes a PKCS #11 token
-+   --, --set-pin=str          Specify the PIN to use on token initialization
-+   -., --set-so-pin=str       Specify the Security Officer's PIN to use on token initialization
-+   -/, --provider=file        Specify the PKCS #11 provider library
-+                                - file must pre-exist
-+   -0, --batch                Disable all interaction with the tool.  All parameters need to be
-+specified on command line.
-+   -v, --version[=arg]        output version information and exit
-+   -h, --help                 display extended usage information and exit
-+   -!, --more-help            extended usage information passed thru pager
-+
-+Options are specified by doubled hyphens and their name or by a single
-+hyphen and the flag character.
-+Operands and options may be intermixed.  They will be reordered.
-+
-+Program that allows operations on PKCS #11 smart cards and security
-+modules.
-+
-+To use PKCS #11 tokens with GnuTLS the p11-kit configuration files need to
-+be setup.  That is create a .module file in /etc/pkcs11/modules with the
-+contents 'module: /path/to/pkcs11.so'.  Alternatively the configuration
-+file /etc/gnutls/pkcs11.conf has to exist and contain a number of lines of
-+the form 'load=/usr/lib/opensc-pkcs11.so'.
-+
-+You can provide the PIN to be used for the PKCS #11 operations with the
-+environment variables GNUTLS_PIN and GNUTLS_SO_PIN.
-+
- @end example
- @exampleindent 4
- 
-diff -ru gnutls-3.4.4/doc/invoke-psktool.texi gnutls-3.4.4.1/doc/invoke-psktool.texi
---- gnutls-3.4.4.1/doc/invoke-psktool.texi	2015-08-10 13:43:57.000000000 -0400
-+++ gnutls-3.4.4/doc/invoke-psktool.texi	2015-07-31 15:44:25.000000000 -0400
-@@ -36,7 +36,27 @@
- 
- @exampleindent 0
- @example
--psktool is unavailable - no --help
-+psktool - GnuTLS PSK tool
-+Usage:  psktool [ -<flag> [<val>] | --<name>[@{=| @}<val>] ]...
-+
-+   -d, --debug=num            Enable debugging
-+                                - it must be in the range:
-+                                  0 to 9999
-+   -s, --keysize=num          specify the key size in bytes
-+                                - it must be in the range:
-+                                  0 to 512
-+   -u, --username=str         specify a username
-+   -p, --passwd=str           specify a password file
-+   -v, --version[=arg]        output version information and exit
-+   -h, --help                 display extended usage information and exit
-+   -!, --more-help            extended usage information passed thru pager
-+
-+Options are specified by doubled hyphens and their name or by a single
-+hyphen and the flag character.
-+
-+Program that generates random keys for use with TLS-PSK.  The keys are
-+stored in hexadecimal format in a key file.
-+
- @end example
- @exampleindent 4
- 
-diff -ru gnutls-3.4.4/doc/invoke-srptool.texi gnutls-3.4.4.1/doc/invoke-srptool.texi
---- gnutls-3.4.4.1/doc/invoke-srptool.texi	2015-08-10 13:43:56.000000000 -0400
-+++ gnutls-3.4.4/doc/invoke-srptool.texi	2015-07-31 15:44:24.000000000 -0400
-@@ -41,7 +41,34 @@
- 
- @exampleindent 0
- @example
--srptool is unavailable - no --help
-+srptool - GnuTLS SRP tool
-+Usage:  srptool [ -<flag> [<val>] | --<name>[@{=| @}<val>] ]...
-+
-+   -d, --debug=num            Enable debugging
-+                                - it must be in the range:
-+                                  0 to 9999
-+   -i, --index=num            specify the index of the group parameters in tpasswd.conf to use
-+   -u, --username=str         specify a username
-+   -p, --passwd=str           specify a password file
-+   -s, --salt=num             specify salt size
-+       --verify               just verify the password.
-+   -v, --passwd-conf=str      specify a password conf file.
-+       --create-conf=str      Generate a password configuration file.
-+   -v, --version[=arg]        output version information and exit
-+   -h, --help                 display extended usage information and exit
-+   -!, --more-help            extended usage information passed thru pager
-+
-+Options are specified by doubled hyphens and their name or by a single
-+hyphen and the flag character.
-+
-+Simple program that emulates the programs in the Stanford SRP (Secure
-+Remote Password) libraries using GnuTLS.  It is intended for use in places
-+where you don't expect SRP authentication to be the used for system users.
-+
-+In brief, to use SRP you need to create two files.  These are the password
-+file that holds the users and the verifiers associated with them and the
-+configuration file to hold the group parameters (called tpasswd.conf).
-+
- @end example
- @exampleindent 4
- 
diff --git a/gnu/packages/patches/grep-CVE-2015-1345.patch b/gnu/packages/patches/grep-CVE-2015-1345.patch
deleted file mode 100644
index b0d0c8e5dc..0000000000
--- a/gnu/packages/patches/grep-CVE-2015-1345.patch
+++ /dev/null
@@ -1,17 +0,0 @@
-Fix CVE-2015-1345.  From upstream commit
-83a95bd8c8561875b948cadd417c653dbe7ef2e2
-by Yuliy Pisetsky <ypisetsky@fb.com>.
-
-diff --git a/src/kwset.c b/src/kwset.c
-index 4003c8d..376f7c3 100644
---- a/src/kwset.c
-+++ b/src/kwset.c
-@@ -643,6 +643,8 @@ bmexec_trans (kwset_t kwset, char const *text, size_t size)
-                     if (! tp)
-                       return -1;
-                     tp++;
-+                    if (ep <= tp)
-+                      break;
-                   }
-               }
-           }
diff --git a/gnu/packages/patches/grep-timing-sensitive-test.patch b/gnu/packages/patches/grep-timing-sensitive-test.patch
new file mode 100644
index 0000000000..8cfcc848bc
--- /dev/null
+++ b/gnu/packages/patches/grep-timing-sensitive-test.patch
@@ -0,0 +1,15 @@
+Skip this performance regression test.
+
+The test measures things on the order of 20ms.  On a loaded machine, we
+have seen enough variation that the test would fail.
+
+--- grep-2.22/tests/long-pattern-perf	2016-01-03 12:52:38.491575007 +0100
++++ grep-2.22/tests/long-pattern-perf	2016-01-03 12:53:39.768464687 +0100
+@@ -16,6 +16,7 @@
+ # You should have received a copy of the GNU General Public License
+ # along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ 
++exit 77
+ . "${srcdir=.}/init.sh"; path_prepend_ ../src
+ 
+ fail=0
diff --git a/gnu/packages/patches/libarchive-bsdtar-test.patch b/gnu/packages/patches/libarchive-bsdtar-test.patch
new file mode 100644
index 0000000000..6a533a9a07
--- /dev/null
+++ b/gnu/packages/patches/libarchive-bsdtar-test.patch
@@ -0,0 +1,74 @@
+commit b539b2e597b566fe3c4b49cb61c9eef83e5e052d
+Author: Pavel Raiskup <praiskup@redhat.com>
+Date:   Thu Jun 27 16:01:30 2013 +0200
+
+    Use ustar format in the test_option_b test
+    
+    .. because the ustar archive does not store SELinux context.  As the default
+    format for bsdtar is "restricted pax" (trying to store xattrs and other
+    things by default), the test failed on Fedora because our files have by
+    default SELinux context set.  This results in additional data in tested
+    archive ~> and the test failed because the archive was unexpectedly big:
+    
+     tar/test/test_option_b.c:41: File archive1.tar has size 3072, expected 2048
+    
+    Reviewed by Konrad Kleine <konrad.wilhelm.kleine@gmail.com>
+
+diff --git a/tar/test/test_option_b.c b/tar/test/test_option_b.c
+index be2ae65..6fea474 100644
+--- a/tar/test/test_option_b.c
++++ b/tar/test/test_option_b.c
+@@ -25,8 +25,14 @@
+ #include "test.h"
+ __FBSDID("$FreeBSD$");
+ 
++#define USTAR_OPT " --format=ustar"
++
+ DEFINE_TEST(test_option_b)
+ {
++	char *testprog_ustar = malloc(strlen(testprog) + sizeof(USTAR_OPT) + 1);
++	strcpy(testprog_ustar, testprog);
++	strcat(testprog_ustar, USTAR_OPT);
++
+ 	assertMakeFile("file1", 0644, "file1");
+ 	if (systemf("cat file1 > test_cat.out 2> test_cat.err") != 0) {
+ 		skipping("Platform doesn't have cat");
+@@ -36,7 +42,7 @@ DEFINE_TEST(test_option_b)
+ 	/*
+ 	 * Bsdtar does not pad if the output is going directly to a disk file.
+ 	 */
+-	assertEqualInt(0, systemf("%s -cf archive1.tar file1 >test1.out 2>test1.err", testprog));
++	assertEqualInt(0, systemf("%s -cf archive1.tar file1 >test1.out 2>test1.err", testprog_ustar));
+ 	failure("bsdtar does not pad archives written directly to regular files");
+ 	assertFileSize("archive1.tar", 2048);
+ 	assertEmptyFile("test1.out");
+@@ -46,24 +52,24 @@ DEFINE_TEST(test_option_b)
+ 	 * Bsdtar does pad to the block size if the output is going to a socket.
+ 	 */
+ 	/* Default is -b 20 */
+-	assertEqualInt(0, systemf("%s -cf - file1 2>test2.err | cat >archive2.tar ", testprog));
++	assertEqualInt(0, systemf("%s -cf - file1 2>test2.err | cat >archive2.tar ", testprog_ustar));
+ 	failure("bsdtar does pad archives written to pipes");
+ 	assertFileSize("archive2.tar", 10240);
+ 	assertEmptyFile("test2.err");
+ 
+-	assertEqualInt(0, systemf("%s -cf - -b 20 file1 2>test3.err | cat >archive3.tar ", testprog));
++	assertEqualInt(0, systemf("%s -cf - -b 20 file1 2>test3.err | cat >archive3.tar ", testprog_ustar));
+ 	assertFileSize("archive3.tar", 10240);
+ 	assertEmptyFile("test3.err");
+ 
+-	assertEqualInt(0, systemf("%s -cf - -b 10 file1 2>test4.err | cat >archive4.tar ", testprog));
++	assertEqualInt(0, systemf("%s -cf - -b 10 file1 2>test4.err | cat >archive4.tar ", testprog_ustar));
+ 	assertFileSize("archive4.tar", 5120);
+ 	assertEmptyFile("test4.err");
+ 
+-	assertEqualInt(0, systemf("%s -cf - -b 1 file1 2>test5.err | cat >archive5.tar ", testprog));
++	assertEqualInt(0, systemf("%s -cf - -b 1 file1 2>test5.err | cat >archive5.tar ", testprog_ustar));
+ 	assertFileSize("archive5.tar", 2048);
+ 	assertEmptyFile("test5.err");
+ 
+-	assertEqualInt(0, systemf("%s -cf - -b 8192 file1 2>test6.err | cat >archive6.tar ", testprog));
++	assertEqualInt(0, systemf("%s -cf - -b 8192 file1 2>test6.err | cat >archive6.tar ", testprog_ustar));
+ 	assertFileSize("archive6.tar", 4194304);
+ 	assertEmptyFile("test6.err");
+ 
diff --git a/gnu/packages/patches/perl-CVE-2015-8607.patch b/gnu/packages/patches/perl-CVE-2015-8607.patch
new file mode 100644
index 0000000000..4c25d41740
--- /dev/null
+++ b/gnu/packages/patches/perl-CVE-2015-8607.patch
@@ -0,0 +1,68 @@
+From 3a629609084d147838368262171b923f0770e564 Mon Sep 17 00:00:00 2001
+From: Tony Cook <tony@develop-help.com>
+Date: Tue, 15 Dec 2015 10:56:54 +1100
+Subject: ensure File::Spec::canonpath() preserves taint
+
+Previously the unix specific XS implementation of canonpath() would
+return an untainted path when supplied a tainted path.
+
+For the empty string case, newSVpvs() already sets taint as needed on
+its result.
+
+This issue was assigned CVE-2015-8607.
+
+Bug: https://rt.perl.org/Ticket/Display.html?id=126862
+Bug-Debian: https://bugs.debian.org/810719
+Origin: upstream
+Patch-Name: fixes/CVE-2015-8607_file_spec_taint_fix.diff
+---
+ dist/PathTools/Cwd.xs    |  1 +
+ dist/PathTools/t/taint.t | 19 ++++++++++++++++++-
+ 2 files changed, 19 insertions(+), 1 deletion(-)
+
+diff --git a/dist/PathTools/Cwd.xs b/dist/PathTools/Cwd.xs
+index 9d4dcf0..3d018dc 100644
+--- a/dist/PathTools/Cwd.xs
++++ b/dist/PathTools/Cwd.xs
+@@ -535,6 +535,7 @@ THX_unix_canonpath(pTHX_ SV *path)
+     *o = 0;
+     SvPOK_on(retval);
+     SvCUR_set(retval, o - SvPVX(retval));
++    SvTAINT(retval);
+     return retval;
+ }
+ 
+diff --git a/dist/PathTools/t/taint.t b/dist/PathTools/t/taint.t
+index 309b3e5..48f8c5b 100644
+--- a/dist/PathTools/t/taint.t
++++ b/dist/PathTools/t/taint.t
+@@ -12,7 +12,7 @@ use Test::More;
+ BEGIN {
+     plan(
+         ${^TAINT}
+-        ? (tests => 17)
++        ? (tests => 21)
+         : (skip_all => "A perl without taint support")
+     );
+ }
+@@ -34,3 +34,20 @@ foreach my $func (@Functions) {
+ 
+ # Previous versions of Cwd tainted $^O
+ is !tainted($^O), 1, "\$^O should not be tainted";
++
++{
++    # [perl #126862] canonpath() loses taint
++    my $tainted = substr($ENV{PATH}, 0, 0);
++    # yes, getcwd()'s result should be tainted, and is tested above
++    # but be sure
++    ok tainted(File::Spec->canonpath($tainted . Cwd::getcwd)),
++        "canonpath() keeps taint on non-empty string";
++    ok tainted(File::Spec->canonpath($tainted)),
++        "canonpath() keeps taint on empty string";
++
++    (Cwd::getcwd() =~ /^(.*)/);
++    my $untainted = $1;
++    ok !tainted($untainted), "make sure our untainted value is untainted";
++    ok !tainted(File::Spec->canonpath($untainted)),
++        "canonpath() doesn't add taint to untainted string";
++}
diff --git a/gnu/packages/patches/perl-deterministic-ordering.patch b/gnu/packages/patches/perl-deterministic-ordering.patch
new file mode 100644
index 0000000000..92e33ef135
--- /dev/null
+++ b/gnu/packages/patches/perl-deterministic-ordering.patch
@@ -0,0 +1,29 @@
+From <https://bugs.debian.org/801523>.
+
+From c01f602d1926b0671fd2c8d91f7e52c4e4c9fb24 Mon Sep 17 00:00:00 2001
+From: Niko Tyni <ntyni@debian.org>
+Date: Sun, 11 Oct 2015 19:27:56 +0300
+Subject: [PATCH] Sort the list of XS code files when generating RealPPPort.xs
+
+all_files_in_dir() uses readdir() ordering to make the list of
+input files. This can vary between build systems, breaking build
+reproducibility.
+---
+ cpan/Devel-PPPort/PPPort_xs.PL | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/cpan/Devel-PPPort/PPPort_xs.PL b/cpan/Devel-PPPort/PPPort_xs.PL
+index 5f18940..149f2fe 100644
+--- a/cpan/Devel-PPPort/PPPort_xs.PL
++++ b/cpan/Devel-PPPort/PPPort_xs.PL
+@@ -38,7 +38,7 @@ END
+ my $file;
+ my $sec;
+ 
+-for $file (all_files_in_dir('parts/inc')) {
++for $file (sort(all_files_in_dir('parts/inc'))) {
+   my $spec = parse_partspec($file);
+ 
+   my $msg = 0;
+-- 
+2.5.1
diff --git a/gnu/packages/patches/perl-module-pluggable-search.patch b/gnu/packages/patches/perl-module-pluggable-search.patch
deleted file mode 100644
index bb2a57f7e5..0000000000
--- a/gnu/packages/patches/perl-module-pluggable-search.patch
+++ /dev/null
@@ -1,25 +0,0 @@
-Fix core Perl module Module::Pluggable such that it can find plugins that live
-in symlinked directories.
-
-Patch borrowed/adapted from Nixpkgs.
-
---- perl-5.16.1/cpan/Module-Pluggable/lib/Module/Pluggable/Object.pm	2015-04-08 23:28:48.120164135 -0500
-+++ perl-5.16.1/cpan/Module-Pluggable/lib/Module/Pluggable/Object.pm	2015-04-08 23:30:27.032166704 -0500
-@@ -164,7 +164,7 @@
-         my $sp = catdir($dir, (split /::/, $searchpath));
- 
-         # if it doesn't exist or it's not a dir then skip it
--        next unless ( -e $sp && -d _ ); # Use the cached stat the second time
-+        next unless ( -e $sp );
- 
-         my @files = $self->find_files($sp);
- 
-@@ -279,7 +279,7 @@
-                              (my $path = $File::Find::name) =~ s#^\\./##;
-                              push @files, $path;
-                            }
--                      }, $search_path );
-+                      }, "$search_path/." );
-     }
-     #chdir $cwd;
-     return @files;
diff --git a/gnu/packages/patches/perl-no-build-time.patch b/gnu/packages/patches/perl-no-build-time.patch
new file mode 100644
index 0000000000..5d78e8f462
--- /dev/null
+++ b/gnu/packages/patches/perl-no-build-time.patch
@@ -0,0 +1,26 @@
+Do not record the configuration and build time so that builds can be
+reproduced bit-for-bit.
+
+--- perl-5.22.0/Configure	1970-01-01 01:00:00.000000000 +0100
++++ perl-5.22.0/Configure	2015-12-13 00:14:43.148165080 +0100
+@@ -3834,6 +3817,7 @@ esac
+ 
+ : who configured the system
+ cf_time=`LC_ALL=C; LANGUAGE=C; export LC_ALL; export LANGUAGE; $date 2>&1`
++cf_time='Thu Jan  1 00:00:01 UTC 1970'
+ case "$cf_by" in
+ "")
+ 	cf_by=`(logname) 2>/dev/null`
+
+--- perl-5.22.0/perl.c	2015-12-13 00:25:30.269156627 +0100
++++ perl-5.22.0/perl.c	2015-12-13 00:25:38.265218175 +0100
+@@ -1795,7 +1795,7 @@ S_Internals_V(pTHX_ CV *cv)
+     PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
+ 			      sizeof(non_bincompat_options) - 1, SVs_TEMP));
+ 
+-#ifdef __DATE__
++#if 0
+ #  ifdef __TIME__
+     PUSHs(Perl_newSVpvn_flags(aTHX_
+ 			      STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
+
diff --git a/gnu/packages/patches/perl-no-sys-dirs.patch b/gnu/packages/patches/perl-no-sys-dirs.patch
index 3aba4d7529..da91fef3b4 100644
--- a/gnu/packages/patches/perl-no-sys-dirs.patch
+++ b/gnu/packages/patches/perl-no-sys-dirs.patch
@@ -1,10 +1,10 @@
-Don't long for headers and libraries in "traditional" locations.
+Don't look for headers and libraries in "traditional" locations.
 
 Patch from Nixpkgs by Eelco Dolstra <eelco.dolstra@logicblox.com>.
 
-diff -ru -x '*~' perl-5.14.2-orig/Configure perl-5.14.2/Configure
---- perl-5.14.2-orig/Configure	2011-09-26 11:44:34.000000000 +0200
-+++ perl-5.14.2/Configure	2012-01-20 17:05:23.089223129 +0100
+diff -ru -x '*~' -x '*.rej' perl-5.20.0-orig/Configure perl-5.20.0/Configure
+--- perl-5.20.0-orig/Configure	2014-05-26 15:34:18.000000000 +0200
++++ perl-5.20.0/Configure	2014-06-25 10:43:35.368285986 +0200
 @@ -106,15 +106,7 @@
  fi
  
@@ -22,7 +22,7 @@ diff -ru -x '*~' perl-5.14.2-orig/Configure perl-5.14.2/Configure
  
  for p in $paths
  do
-@@ -1311,8 +1303,7 @@
+@@ -1337,8 +1329,7 @@
  archname=''
  : Possible local include directories to search.
  : Set locincpth to "" in a hint file to defeat local include searches.
@@ -32,8 +32,8 @@ diff -ru -x '*~' perl-5.14.2-orig/Configure perl-5.14.2/Configure
  :
  : no include file wanted by default
  inclwanted=''
-@@ -1328,17 +1319,12 @@
- archobjs=''
+@@ -1349,17 +1340,12 @@
+ 
  libnames=''
  : change the next line if compiling for Xenix/286 on Xenix/386
 -xlibpth='/usr/lib/386 /lib/386'
@@ -53,7 +53,7 @@ diff -ru -x '*~' perl-5.14.2-orig/Configure perl-5.14.2/Configure
  
  : Private path used by Configure to find libraries.  Its value
  : is prepended to libpth. This variable takes care of special
-@@ -1371,8 +1357,6 @@
+@@ -1391,8 +1377,6 @@
  libswanted="$libswanted m crypt sec util c cposix posix ucb bsd BSD"
  : We probably want to search /usr/shlib before most other libraries.
  : This is only used by the lib/ExtUtils/MakeMaker.pm routine extliblist.
@@ -62,27 +62,27 @@ diff -ru -x '*~' perl-5.14.2-orig/Configure perl-5.14.2/Configure
  : Do not use vfork unless overridden by a hint file.
  usevfork=false
  
-@@ -2380,7 +2364,6 @@
+@@ -2446,7 +2430,6 @@
  zip
  "
  pth=`echo $PATH | sed -e "s/$p_/ /g"`
--pth="$pth /lib /usr/lib"
+-pth="$pth $sysroot/lib $sysroot/usr/lib"
  for file in $loclist; do
  	eval xxx=\$$file
  	case "$xxx" in
-@@ -4785,7 +4768,7 @@
+@@ -4936,7 +4919,7 @@
  : Set private lib path
  case "$plibpth" in
  '') if ./mips; then
--		plibpth="$incpath/usr/lib /usr/local/lib /usr/ccs/lib"
-+		plibpth="$incpath/usr/lib"
- 	fi;;
+-	plibpth="$incpath/usr/lib $sysroot/usr/local/lib $sysroot/usr/ccs/lib"
++	plibpth="$incpath/usr/lib"
+     fi;;
  esac
  case "$libpth" in
-@@ -8390,13 +8373,8 @@
+@@ -8600,13 +8583,8 @@
  echo " "
  case "$sysman" in
- '') 
+ '')
 -	syspath='/usr/share/man/man1 /usr/man/man1'
 -	syspath="$syspath /usr/man/mann /usr/man/manl /usr/man/local/man1"
 -	syspath="$syspath /usr/man/u_man/man1"
@@ -95,7 +95,7 @@ diff -ru -x '*~' perl-5.14.2-orig/Configure perl-5.14.2/Configure
  	;;
  esac
  if $test -d "$sysman"; then
-@@ -19721,9 +19699,10 @@
+@@ -19900,9 +19878,10 @@
  case "$full_ar" in
  '') full_ar=$ar ;;
  esac
@@ -107,10 +107,11 @@ diff -ru -x '*~' perl-5.14.2-orig/Configure perl-5.14.2/Configure
  
  : see what type gids are declared as in the kernel
  echo " "
-diff -ru -x '*~' perl-5.14.2-orig/ext/Errno/Errno_pm.PL perl-5.14.2/ext/Errno/Errno_pm.PL
---- perl-5.14.2-orig/ext/Errno/Errno_pm.PL	2011-09-26 11:44:34.000000000 +0200
-+++ perl-5.14.2/ext/Errno/Errno_pm.PL	2012-01-20 17:02:07.938138311 +0100
-@@ -137,11 +137,7 @@
+Only in perl-5.20.0/: Configure.orig
+diff -ru -x '*~' -x '*.rej' perl-5.20.0-orig/ext/Errno/Errno_pm.PL perl-5.20.0/ext/Errno/Errno_pm.PL
+--- perl-5.20.0-orig/ext/Errno/Errno_pm.PL	2014-05-26 15:34:20.000000000 +0200
++++ perl-5.20.0/ext/Errno/Errno_pm.PL	2014-06-25 10:31:24.317970047 +0200
+@@ -126,11 +126,7 @@
  	if ($dep =~ /(\S+errno\.h)/) {
  	     $file{$1} = 1;
  	}
@@ -120,13 +121,14 @@ diff -ru -x '*~' perl-5.14.2-orig/ext/Errno/Errno_pm.PL perl-5.14.2/ext/Errno/Er
 -	      # might be using, say, Intel's icc
 -	     ) {
 +    } elsif (0) {
+     # When cross-compiling we may store a path for gcc's "sysroot" option:
+     my $sysroot = $Config{sysroot} || '';
  	# Some Linuxes have weird errno.hs which generate
- 	# no #file or #line directives
- 	my $linux_errno_h = -e '/usr/include/errno.h' ?
-diff -ru -x '*~' perl-5.14.2-orig/hints/freebsd.sh perl-5.14.2/hints/freebsd.sh
---- perl-5.14.2-orig/hints/freebsd.sh	2011-09-19 15:18:22.000000000 +0200
-+++ perl-5.14.2/hints/freebsd.sh	2012-01-20 17:10:37.267924044 +0100
-@@ -118,21 +118,21 @@
+Only in perl-5.20.0/ext/Errno: Errno_pm.PL.orig
+diff -ru -x '*~' -x '*.rej' perl-5.20.0-orig/hints/freebsd.sh perl-5.20.0/hints/freebsd.sh
+--- perl-5.20.0-orig/hints/freebsd.sh	2014-01-31 22:55:51.000000000 +0100
++++ perl-5.20.0/hints/freebsd.sh	2014-06-25 10:25:53.263964680 +0200
+@@ -119,21 +119,21 @@
          objformat=`/usr/bin/objformat`
          if [ x$objformat = xaout ]; then
              if [ -e /usr/lib/aout ]; then
@@ -154,3 +156,99 @@ diff -ru -x '*~' perl-5.14.2-orig/hints/freebsd.sh perl-5.14.2/hints/freebsd.sh
         ldflags="-Wl,-E "
          lddlflags="-shared "
          cccdlflags='-DPIC -fPIC'
+diff -ru -x '*~' -x '*.rej' perl-5.20.0-orig/hints/linux.sh perl-5.20.0/hints/linux.sh
+--- perl-5.20.0-orig/hints/linux.sh	2014-05-26 15:34:20.000000000 +0200
++++ perl-5.20.0/hints/linux.sh	2014-06-25 10:33:47.354883843 +0200
+@@ -150,25 +150,6 @@
+     ;;
+ esac
+ 
+-# Ubuntu 11.04 (and later, presumably) doesn't keep most libraries
+-# (such as -lm) in /lib or /usr/lib.  So we have to ask gcc to tell us
+-# where to look.  We don't want gcc's own libraries, however, so we
+-# filter those out.
+-# This could be conditional on Unbuntu, but other distributions may
+-# follow suit, and this scheme seems to work even on rather old gcc's.
+-# This unconditionally uses gcc because even if the user is using another
+-# compiler, we still need to find the math library and friends, and I don't
+-# know how other compilers will cope with that situation.
+-# Morever, if the user has their own gcc earlier in $PATH than the system gcc,
+-# we don't want its libraries. So we try to prefer the system gcc
+-# Still, as an escape hatch, allow Configure command line overrides to
+-# plibpth to bypass this check.
+-if [ -x /usr/bin/gcc ] ; then
+-    gcc=/usr/bin/gcc
+-else
+-    gcc=gcc
+-fi
+-
+ case "$plibpth" in
+ '') plibpth=`LANG=C LC_ALL=C $gcc $ccflags $ldflags -print-search-dirs | grep libraries |
+ 	cut -f2- -d= | tr ':' $trnl | grep -v 'gcc' | sed -e 's:/$::'`
+@@ -178,32 +159,6 @@
+     ;;
+ esac
+ 
+-case "$libc" in
+-'')
+-# If you have glibc, then report the version for ./myconfig bug reporting.
+-# (Configure doesn't need to know the specific version since it just uses
+-# gcc to load the library for all tests.)
+-# We don't use __GLIBC__ and  __GLIBC_MINOR__ because they
+-# are insufficiently precise to distinguish things like
+-# libc-2.0.6 and libc-2.0.7.
+-    for p in $plibpth
+-    do
+-        for trylib in libc.so.6 libc.so
+-        do
+-            if $test -e $p/$trylib; then
+-                libc=`ls -l $p/$trylib | awk '{print $NF}'`
+-                if $test "X$libc" != X; then
+-                    break
+-                fi
+-            fi
+-        done
+-        if $test "X$libc" != X; then
+-            break
+-        fi
+-    done
+-    ;;
+-esac
+-
+ # Are we using ELF?  Thanks to Kenneth Albanowski <kjahds@kjahds.com>
+ # for this test.
+ cat >try.c <<'EOM'
+@@ -367,33 +322,6 @@
+ 	;;
+ esac
+ 
+-# SuSE8.2 has /usr/lib/libndbm* which are ld scripts rather than
+-# true libraries. The scripts cause binding against static
+-# version of -lgdbm which is a bad idea. So if we have 'nm'
+-# make sure it can read the file
+-# NI-S 2003/08/07
+-case "$nm" in
+-    '') ;;
+-    *)
+-    for p in $plibpth
+-    do
+-        if $test -r $p/libndbm.so; then
+-            if $nm $p/libndbm.so >/dev/null 2>&1 ; then
+-                echo 'Your shared -lndbm seems to be a real library.'
+-                _libndbm_real=1
+-                break
+-            fi
+-        fi
+-    done
+-    if $test "X$_libndbm_real" = X; then
+-        echo 'Your shared -lndbm is not a real library.'
+-        set `echo X "$libswanted "| sed -e 's/ ndbm / /'`
+-        shift
+-        libswanted="$*"
+-    fi
+-    ;;
+-esac
+-
+ # Linux on Synology.
+ if [ -f /etc/synoinfo.conf -a -d /usr/syno ]; then
+     # Tested on Synology DS213 and DS413
diff --git a/gnu/packages/patches/perl-source-date-epoch.patch b/gnu/packages/patches/perl-source-date-epoch.patch
new file mode 100644
index 0000000000..37330c9537
--- /dev/null
+++ b/gnu/packages/patches/perl-source-date-epoch.patch
@@ -0,0 +1,19 @@
+Adapted from <https://bugs.debian.org/801621>.
+Make Pod::Man honor the SOURCE_DATE_EPOCH environment variable.
+
+--- perl-5.22.0/cpan/podlators/lib/Pod/Man.pm	2015-12-12 22:33:03.321787590 +0100
++++ perl-5.22.0/cpan/podlators/lib/Pod/Man.pm	2015-12-12 22:36:33.367361338 +0100
+@@ -884,7 +884,12 @@ sub devise_date {
+     my ($self) = @_;
+     my $input = $self->source_filename;
+     my $time;
+-    if ($input) {
++
++    if (defined($ENV{SOURCE_DATE_EPOCH}) &&
++        $ENV{SOURCE_DATE_EPOCH} !~ /\D/) {
++        $time = $ENV{SOURCE_DATE_EPOCH};
++    }
++    elsif ($input) {
+         $time = (stat $input)[9] || time;
+     } else {
+         $time = time;
diff --git a/gnu/packages/patches/procps-make-3.82.patch b/gnu/packages/patches/procps-make-3.82.patch
deleted file mode 100644
index 7bf53e2ccc..0000000000
--- a/gnu/packages/patches/procps-make-3.82.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-Fix compilation with GNU Make 3.82 (patch from Nixpkgs).
-
-diff --git a/Makefile b/Makefile
-index 09fb3ed..59eba16 100644
---- a/Makefile
-+++ b/Makefile
-@@ -174,7 +174,7 @@ INSTALL := $(BINFILES) $(MANFILES)
- # want this rule first, use := on ALL, and ALL not filled in yet
- all: do_all
- 
---include */module.mk
-+-include proc/module.mk ps/module.mk
- 
- do_all:    $(ALL)
diff --git a/gnu/packages/patches/python-2.7-search-paths.patch b/gnu/packages/patches/python-2.7-search-paths.patch
index 6e5339f3a6..ba7235df27 100644
--- a/gnu/packages/patches/python-2.7-search-paths.patch
+++ b/gnu/packages/patches/python-2.7-search-paths.patch
@@ -1,5 +1,5 @@
-Make sure the build system honors CPATH and LIBRARY_PATH when looking for
-headers and libraries.
+Make sure the build system honors C_INCLUDE_PATH and LIBRARY_PATH when
+looking for headers and libraries.
 
 --- Python-2.7.10/setup.py	2015-10-07 18:33:18.125153186 +0200
 +++ Python-2.7.10/setup.py	2015-10-07 18:33:47.497347552 +0200
@@ -9,7 +9,7 @@ headers and libraries.
  
 +        # Always honor these variables.
 +        lib_dirs += os.getenv('LIBRARY_PATH', '').split(os.pathsep)
-+        inc_dirs += os.getenv('CPATH', '').split(os.pathsep)
++        inc_dirs += os.getenv('C_INCLUDE_PATH', '').split(os.pathsep)
 +
          # OSF/1 and Unixware have some stuff in /usr/ccs/lib (like -ldb)
          if host_platform in ['osf1', 'unixware7', 'openunix8']:
diff --git a/gnu/packages/patches/python-3-search-paths.patch b/gnu/packages/patches/python-3-search-paths.patch
index 547feae1b9..7feddb8e30 100644
--- a/gnu/packages/patches/python-3-search-paths.patch
+++ b/gnu/packages/patches/python-3-search-paths.patch
@@ -1,5 +1,5 @@
-Make sure the build system honors CPATH and LIBRARY_PATH when looking for
-headers and libraries.
+Make sure the build system honors C_INCLUDE_PATH and LIBRARY_PATH when
+looking for headers and libraries.
 
 --- setup.py	2015-10-07 23:32:58.891329173 +0200
 +++ setup.py	2015-10-07 23:46:29.653349924 +0200
@@ -13,7 +13,7 @@ headers and libraries.
 -                ]
 -            inc_dirs = self.compiler.include_dirs + ['/usr/include']
 +            lib_dirs = os.getenv('LIBRARY_PATH', '').split(os.pathsep)
-+            inc_dirs = os.getenv('CPATH', '').split(os.pathsep)
++            inc_dirs = os.getenv('C_INCLUDE_PATH', '').split(os.pathsep)
          else:
              lib_dirs = self.compiler.library_dirs[:]
              inc_dirs = self.compiler.include_dirs[:]
diff --git a/gnu/packages/pcre.scm b/gnu/packages/pcre.scm
index 5d6618a9ec..d2933bbe38 100644
--- a/gnu/packages/pcre.scm
+++ b/gnu/packages/pcre.scm
@@ -42,6 +42,8 @@
              (base32
               "1pvra19ljkr5ky35y2iywjnsckrs9ch2anrf5b0dc91hw8v2vq5r"))))
    (build-system gnu-build-system)
+   (outputs '("out"
+              "doc"))                             ;1.8 MiB of HTML
    (inputs `(("bzip2" ,bzip2)
              ("readline" ,readline)
              ("zlib" ,zlib)))
diff --git a/gnu/packages/perl.scm b/gnu/packages/perl.scm
index 6c0b4d2f6c..162fc9b8f3 100644
--- a/gnu/packages/perl.scm
+++ b/gnu/packages/perl.scm
@@ -1,9 +1,10 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2013 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2015 Ricardo Wurmus <rekado@elephly.net>
 ;;; Copyright © 2015 Eric Bavier <bavier@member.fsf.org>
 ;;; Copyright © 2015 Eric Dvorsak <eric@dvorsak.fr>
+;;; Copyright © 2016 Mark H Weaver <mhw@netris.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -37,18 +38,21 @@
   ;; Yeah, Perl...  It is required early in the bootstrap process by Linux.
   (package
     (name "perl")
-    (version "5.16.1")
+    (version "5.22.1")
     (source (origin
              (method url-fetch)
              (uri (string-append "http://www.cpan.org/src/5.0/perl-"
                                  version ".tar.gz"))
              (sha256
               (base32
-               "15qxzba3a50c9nik5ydgyfp62x7h9vxxn12yd1jgl93hb1wj96km"))
+               "09wg24w5syyafyv87l6z8pxwz4bjgcdj996bx5844k6m9445sirb"))
              (patches (map search-patch
                            '("perl-no-sys-dirs.patch"
                              "perl-autosplit-default-time.patch"
-                             "perl-module-pluggable-search.patch")))))
+                             "perl-source-date-epoch.patch"
+                             "perl-deterministic-ordering.patch"
+                             "perl-no-build-time.patch"
+                             "perl-CVE-2015-8607.patch")))))
     (build-system gnu-build-system)
     (arguments
      '(#:tests? #f
@@ -60,10 +64,16 @@
             (let ((out  (assoc-ref outputs "out"))
                   (libc (assoc-ref inputs "libc")))
               ;; Use the right path for `pwd'.
-              (substitute* "dist/Cwd/Cwd.pm"
+              (substitute* "dist/PathTools/Cwd.pm"
                 (("/bin/pwd")
                  (which "pwd")))
 
+              ;; Build in GNU89 mode to tolerate C++-style comment in libc's
+              ;; <bits/string3.h>.
+              (substitute* "cflags.SH"
+                (("-std=c89")
+                 "-std=gnu89"))
+
               (zero?
                (system* "./Configure"
                         (string-append "-Dprefix=" out)
diff --git a/gnu/packages/pkg-config.scm b/gnu/packages/pkg-config.scm
index dd5120c474..5923395dec 100644
--- a/gnu/packages/pkg-config.scm
+++ b/gnu/packages/pkg-config.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -30,7 +30,7 @@
 (define-public %pkg-config
   (package
    (name "pkg-config")
-   (version "0.28")
+   (version "0.29")
    (source (origin
             (method url-fetch)
             (uri (string-append
@@ -38,7 +38,7 @@
                   version ".tar.gz"))
             (sha256
              (base32
-              "0igqq5m204w71m11y0nipbdf5apx87hwfll6axs12hn4dqfb6vkb"))))
+              "0sq09a39wj4cxf8l2jvkq067g08ywfma4v6nhprnf351s82pfl68"))))
    (build-system gnu-build-system)
    (arguments `(#:configure-flags '("--with-internal-glib")))
    (native-search-paths
diff --git a/gnu/packages/plotutils.scm b/gnu/packages/plotutils.scm
index 09a2d4f91d..e9a247142d 100644
--- a/gnu/packages/plotutils.scm
+++ b/gnu/packages/plotutils.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2015 Eric Bavier <bavier@member.fsf.org>
 ;;;
 ;;; This file is part of GNU Guix.
@@ -193,7 +193,7 @@ colors, styles, options and details.")
      `(("fftw" ,fftw)
        ("freeglut" ,freeglut)
        ("gsl" ,gsl)
-       ("libgc" ,libgc-for-c++)
+       ("libgc" ,libgc)
        ("python" ,python-2)
        ("readline" ,readline)
        ("zlib" ,zlib)))
diff --git a/gnu/packages/pulseaudio.scm b/gnu/packages/pulseaudio.scm
index d5e8aba272..fe976a92f4 100644
--- a/gnu/packages/pulseaudio.scm
+++ b/gnu/packages/pulseaudio.scm
@@ -58,8 +58,9 @@
     (inputs
      `(("libvorbis" ,libvorbis)
        ("libogg" ,libogg)
-       ("flac" ,flac)
-       ("pkg-config" ,pkg-config)))
+       ("flac" ,flac)))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)))
     (home-page "http://www.mega-nerd.com/libsndfile/")
     (synopsis "Reading and writing files containing sampled sound")
     (description
@@ -87,7 +88,8 @@ for reading and writing new sound file formats.")
               (base32
                "01hw5xjbjavh412y63brcslj5hi9wdgkjd3h9csx5rnm8vglpdck"))))
     (build-system gnu-build-system)
-    (inputs `(("pkg-config" ,pkg-config)))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)))
     (propagated-inputs
      `(("libsndfile" ,libsndfile)
        ("fftw" ,fftw)))
@@ -162,13 +164,14 @@ rates.")
        ("dbus" ,dbus)
        ("glib" ,glib)
        ("intltool" ,intltool)
-       ("pkg-config" ,pkg-config)
        ("m4" ,m4)
        ("libltdl" ,libltdl)
        ("fftwf" ,fftwf)
        ("avahi" ,avahi)
        ("eudev" ,eudev)           ;for the detection of hardware audio devices
        ("check" ,check)))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)))
     (propagated-inputs
      ;; 'libpulse*.la' contain `-lgdbm' and `-lcap', so propagate them.
      `(("libcap" ,libcap)
diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index 4ab1eede6c..a01c99e1eb 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -308,7 +308,9 @@ data types.")
     (inputs `(("openssl" ,openssl)
               ("zlib" ,zlib)))))
 
-(define* (wrap-python3 python #:optional (name "python-wrapper"))
+(define* (wrap-python3 python
+                       #:optional
+                       (name (string-append (package-name python) "-wrapper")))
   (package (inherit python)
     (name name)
     (source #f)
diff --git a/gnu/packages/ruby.scm b/gnu/packages/ruby.scm
index 577be185f4..fd36f8d694 100644
--- a/gnu/packages/ruby.scm
+++ b/gnu/packages/ruby.scm
@@ -4,7 +4,7 @@
 ;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2014, 2015 David Thompson <davet@gnu.org>
 ;;; Copyright © 2015 Ricardo Wurmus <rekado@elephly.net>
-;;; Copyright © 2015 Ben Woodcroft <donttrustben@gmail.com>
+;;; Copyright © 2015, 2016 Ben Woodcroft <donttrustben@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -46,7 +46,7 @@
 (define-public ruby
   (package
     (name "ruby")
-    (version "2.2.4")
+    (version "2.3.0")
     (source
      (origin
        (method url-fetch)
@@ -55,28 +55,33 @@
                            "/ruby-" version ".tar.xz"))
        (sha256
         (base32
-         "0g3ps4q3iz7wj9m45n8xyxzw8nh29ljdqb87b0f6i0p3853gz2yj"))))
+         "15s0dsb5ynf3d2w5gzawnszq5594fqvapv2y7a0qw16przq5l4kh"))
+       (modules '((guix build utils)))
+       (snippet `(begin
+                   ;; Remove bundled libffi
+                   (delete-file-recursively
+                    (string-append "ext/fiddle/libffi-3.2.1"))
+                   #t))))
     (build-system gnu-build-system)
     (arguments
      `(#:test-target "test"
-       #:parallel-tests? #f
        #:phases
-       (alist-cons-before
-        'configure 'replace-bin-sh
-        (lambda _
-          (substitute* '("Makefile.in"
-                         "ext/pty/pty.c"
-                         "io.c"
-                         "lib/mkmf.rb"
-                         "process.c"
-                         "test/rubygems/test_gem_ext_configure_builder.rb"
-                         "test/rdoc/test_rdoc_parser.rb"
-                         "test/ruby/test_rubyoptions.rb"
-                         "test/ruby/test_process.rb"
-                         "test/ruby/test_system.rb"
-                         "tool/rbinstall.rb")
-            (("/bin/sh") (which "sh"))))
-        %standard-phases)))
+       (modify-phases %standard-phases
+         (add-before 'configure 'replace-bin-sh-and-remove-libffi
+           (lambda _
+             (substitute* '("Makefile.in"
+                            "ext/pty/pty.c"
+                            "io.c"
+                            "lib/mkmf.rb"
+                            "process.c"
+                            "test/rubygems/test_gem_ext_configure_builder.rb"
+                            "test/rdoc/test_rdoc_parser.rb"
+                            "test/ruby/test_rubyoptions.rb"
+                            "test/ruby/test_process.rb"
+                            "test/ruby/test_system.rb"
+                            "tool/rbinstall.rb")
+               (("/bin/sh") (which "sh")))
+             #t)))))
     (inputs
      `(("readline" ,readline)
        ("openssl" ,openssl)
@@ -95,6 +100,25 @@ a focus on simplicity and productivity.")
     (home-page "https://ruby-lang.org")
     (license license:ruby)))
 
+(define-public ruby-2.2
+  (package (inherit ruby)
+    (version "2.2.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "http://cache.ruby-lang.org/pub/ruby/"
+                           (version-major+minor version)
+                           "/ruby-" version ".tar.xz"))
+       (sha256
+        (base32
+         "0g3ps4q3iz7wj9m45n8xyxzw8nh29ljdqb87b0f6i0p3853gz2yj"))
+       (modules '((guix build utils)))
+       (snippet `(begin
+                   ;; Remove bundled libffi
+                   (delete-file-recursively
+                    (string-append "ext/fiddle/libffi-3.2.1"))
+                   #t))))))
+
 (define-public ruby-2.1
   (package (inherit ruby)
     (version "2.1.8")
@@ -1059,13 +1083,13 @@ using Net::HTTP, supporting reconnection and retry according to RFC 2616.")
 (define-public ruby-power-assert
   (package
     (name "ruby-power-assert")
-    (version "0.2.6")
+    (version "0.2.7")
     (source (origin
               (method url-fetch)
               (uri (rubygems-uri "power_assert" version))
               (sha256
                (base32
-                "0gbj379jhnff8rbb6m3kzdm282szjz1a021xzxa38d1bnswj2jx3"))))
+                "0ka6w71lcan4wgf111xi3pcn9ma9lhakv31jg8w007nwzi0xfjbi"))))
     (build-system ruby-build-system)
     (native-inputs
      `(("bundler" ,bundler)))
@@ -1212,15 +1236,18 @@ It allows writing tests, checking results and automated testing in Ruby.")
      `(#:phases
        (modify-phases %standard-phases
          (add-after 'unpack 'add-test-unit-to-search-path
-          (lambda* (#:key inputs #:allow-other-keys)
-            (substitute* "Rakefile"
-              (("t\\.libs << \"test\"" line)
-               (string-append line "; t.libs << \""
-                              (assoc-ref inputs "ruby-test-unit")
-                              "/lib/ruby/gems/2.2.0/gems/test-unit-"
-                              ,(package-version ruby-test-unit)
-                              "/lib\"")))
-            #t)))))
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let* ((test-unit (assoc-ref inputs "ruby-test-unit"))
+                    (test-unit-home (gem-home test-unit
+                                              ,(package-version ruby))))
+               (substitute* "Rakefile"
+                 (("t\\.libs << \"test\"" line)
+                  (string-append line "; t.libs << \""
+                                 test-unit-home
+                                 "/gems/test-unit-"
+                                 ,(package-version ruby-test-unit)
+                                 "/lib\""))))
+             #t)))))
     (native-inputs
      `(("bundler" ,bundler)
        ("ruby-test-unit" ,ruby-test-unit)))
@@ -1274,15 +1301,18 @@ as a base class when writing classes that depend upon
      `(#:phases
        (modify-phases %standard-phases
          (add-after 'unpack 'add-test-unit-to-search-path
-          (lambda* (#:key inputs #:allow-other-keys)
-            (substitute* "Rakefile"
-              (("t\\.libs << \"test\"" line)
-               (string-append line "; t.libs << \""
-                              (assoc-ref inputs "ruby-test-unit")
-                              "/lib/ruby/gems/2.2.0/gems/test-unit-"
-                              ,(package-version ruby-test-unit)
-                              "/lib\"")))
-            #t)))))
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let* ((test-unit (assoc-ref inputs "ruby-test-unit"))
+                    (test-unit-home (gem-home test-unit ,(package-version
+                                                          ruby))))
+               (substitute* "Rakefile"
+                 (("t\\.libs << \"test\"" line)
+                  (string-append line "; t.libs << \""
+                                 test-unit-home
+                                 "/gems/test-unit-"
+                                 ,(package-version ruby-test-unit)
+                                 "/lib\""))))
+             #t)))))
     (propagated-inputs
      `(("ruby-blankslate" ,ruby-blankslate)))
     (native-inputs
@@ -1311,13 +1341,16 @@ knowing anything about the constructor.")
        (modify-phases %standard-phases
          (add-after 'unpack 'add-test-unit-to-search-path
           (lambda* (#:key inputs #:allow-other-keys)
-            (substitute* "Rakefile"
-              (("t\\.libs << \"test\"" line)
-               (string-append line "; t.libs << \""
-                              (assoc-ref inputs "ruby-test-unit")
-                              "/lib/ruby/gems/2.2.0/gems/test-unit-"
-                              ,(package-version ruby-test-unit)
-                              "/lib\"")))
+            (let* ((test-unit (assoc-ref inputs "ruby-test-unit"))
+                   (test-unit-home (gem-home test-unit ,(package-version
+                                                         ruby))))
+              (substitute* "Rakefile"
+                (("t\\.libs << \"test\"" line)
+                 (string-append line "; t.libs << \""
+                                test-unit-home
+                                "/gems/test-unit-"
+                                ,(package-version ruby-test-unit)
+                                "/lib\""))))
             #t)))))
     (propagated-inputs
      `(("ruby-instantiator" ,ruby-instantiator)
@@ -1381,13 +1414,16 @@ conversion to (X)HTML.")
        (modify-phases %standard-phases
          (add-after 'unpack 'add-test-unit-to-search-path
           (lambda* (#:key inputs #:allow-other-keys)
-            (substitute* "Rakefile"
-              (("t\\.libs << 'test'" line)
-               (string-append line "; t.libs << \""
-                              (assoc-ref inputs "ruby-test-unit")
-                              "/lib/ruby/gems/2.2.0/gems/test-unit-"
-                              ,(package-version ruby-test-unit)
-                              "/lib\"")))
+            (let* ((test-unit (assoc-ref inputs "ruby-test-unit"))
+                   (test-unit-home (gem-home test-unit
+                                             ,(package-version ruby))))
+              (substitute* "Rakefile"
+                (("t\\.libs << 'test'" line)
+                 (string-append line "; t.libs << \""
+                                test-unit-home
+                                "/gems/test-unit-"
+                                ,(package-version ruby-test-unit)
+                                "/lib\""))))
             #t))
          (add-before 'check 'use-latest-redcarpet
           (lambda _
@@ -2047,13 +2083,17 @@ development of Ruby gems.")
        (modify-phases %standard-phases
          (add-after 'unpack 'fix-test-include-path
           (lambda* (#:key inputs #:allow-other-keys)
-            (substitute* "Rakefile"
-              (("Hoe\\.add_include_dirs .*")
-               (string-append "Hoe.add_include_dirs \""
-                              (assoc-ref inputs "ruby-minitest-4")
-                              "/lib/ruby/gems/2.2.0/gems/minitest-"
-                              ,(package-version ruby-minitest-4)
-                              "/lib" "\"")))))
+             (let* ((minitest (assoc-ref inputs "ruby-minitest-4"))
+                    (minitest-home (gem-home minitest
+                                             ,(package-version ruby))))
+               (substitute* "Rakefile"
+                 (("Hoe\\.add_include_dirs .*")
+                  (string-append "Hoe.add_include_dirs \""
+                                 minitest-home
+                                 "/gems/minitest-"
+                                 ,(package-version ruby-minitest-4)
+                                 "/lib" "\""))))
+             #t))
          (add-before 'check 'fix-test-assumptions
           (lambda _
             ;; The test output includes the file name, so a couple of tests
@@ -2776,9 +2816,17 @@ features such as filtering and fine grained logging.")
      `(#:test-target "specs"
        #:phases
        (modify-phases %standard-phases
-         (add-before 'check 'set-HOME
-          ;; $HOME needs to be set to somewhere writeable for tests to run
-          (lambda _ (setenv "HOME" "/tmp") #t)))))
+         (add-before 'check 'set-HOME-and-disable-failing-test
+           (lambda _
+             ;; $HOME needs to be set to somewhere writeable for tests to run
+             (setenv "HOME" "/tmp")
+             ;; Disable tests which fails on Ruby 2.3.  See
+             ;; https://github.com/lsegal/yard/issues/927
+             (substitute* "spec/parser/ruby/ruby_parser_spec.rb"
+               (("comment.type.should == :comment") "")
+               (("comment.docstring_hash_flag.should be_true") "")
+               (("comment.docstring.strip.should == .*") ""))
+             #t)))))
     (native-inputs
      `(("ruby-rspec" ,ruby-rspec-2)
        ("ruby-rack" ,ruby-rack)))
diff --git a/gnu/packages/texinfo.scm b/gnu/packages/texinfo.scm
index 591fb1f298..cc53293221 100644
--- a/gnu/packages/texinfo.scm
+++ b/gnu/packages/texinfo.scm
@@ -43,7 +43,6 @@
     (build-system gnu-build-system)
     (native-inputs `(("procps" ,procps)))  ;one of the tests needs pgrep
     (inputs `(("ncurses" ,ncurses)
-              ("xz" ,xz)
               ("perl" ,perl)))
 
     (native-search-paths
diff --git a/gnu/packages/tls.scm b/gnu/packages/tls.scm
index 578953403e..c10d1cbfc7 100644
--- a/gnu/packages/tls.scm
+++ b/gnu/packages/tls.scm
@@ -5,6 +5,7 @@
 ;;; Copyright © 2013, 2015 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2015 David Thompson <davet@gnu.org>
 ;;; Copyright © 2015 Leo Famulari <leo@famulari.name>
+;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -45,7 +46,7 @@
 (define-public libtasn1
   (package
     (name "libtasn1")
-    (version "4.5")
+    (version "4.7")
     (source
      (origin
       (method url-fetch)
@@ -53,13 +54,9 @@
                           version ".tar.gz"))
       (sha256
        (base32
-        "1nhvnznhg2aqfrfjxc8v008hjlzkh5831jsfahqk89qrw7fbbcw9"))))
+        "1j8iixynchziw1y39lnibyl5h81m4p78w3i4f28q2vgwjgf801x4"))))
     (build-system gnu-build-system)
-    (native-inputs `(("perl" ,perl)
-
-                     ;; XXX: For some reason, libtasn1.info wants to be
-                     ;; rebuilt, so we must provide 'makeinfo'.
-                     ("texinfo" ,texinfo)))
+    (native-inputs `(("perl" ,perl)))
     (home-page "http://www.gnu.org/software/libtasn1/")
     (synopsis "ASN.1 library")
     (description
@@ -110,7 +107,7 @@ living in the same process.")
 (define-public gnutls
   (package
     (name "gnutls")
-    (version "3.4.5")
+    (version "3.4.7")
     (source (origin
              (method url-fetch)
              (uri
@@ -121,8 +118,7 @@ living in the same process.")
                              "/gnutls-" version ".tar.xz"))
              (sha256
               (base32
-               "1bks1zpmhmnkz2v32dd9b44pz6x0a5w4yi9zzwsd0a078vhbi25g"))
-             (patches (list (search-patch "gnutls-doc-fix.patch")))))
+               "0nifi3mr5jhz608pidkp8cjs4vwfj1m2qczsjrgpnp99615rxgn1"))))
     (build-system gnu-build-system)
     (arguments
      '(#:configure-flags
@@ -146,13 +142,6 @@ living in the same process.")
 
        #:phases (modify-phases %standard-phases
                   (add-after
-                   'unpack 'delete-prebuilt-unfixed-info-file
-                   (lambda _
-                     ;; XXX Delete the prebuilt info file, so that it will be
-                     ;; rebuilt with the fixes in gnutls-doc-fix.patch.
-                     (delete-file "doc/gnutls.info")
-                     #t))
-                  (add-after
                    'install 'move-doc
                    (lambda* (#:key outputs #:allow-other-keys)
                      ;; Copy the 4.1 MiB of section 3 man pages to "doc".
@@ -169,7 +158,6 @@ living in the same process.")
                "doc"))                            ;4.1 MiB of man pages
     (native-inputs
      `(("pkg-config" ,pkg-config)
-       ("texinfo" ,texinfo) ; XXX needed only to replace prebuilt, unfixed docs.
        ("which" ,which)))
     (inputs
      `(("guile" ,guile-2.0)
diff --git a/gnu/packages/video.scm b/gnu/packages/video.scm
index 752e51d0a7..340027e849 100644
--- a/gnu/packages/video.scm
+++ b/gnu/packages/video.scm
@@ -1055,7 +1055,7 @@ for use with HTML5 video.")
           (lambda _
             ;; Copy-paste settings from the cmake build system.
             (setenv "CMAKE_LIBRARY_PATH" (getenv "LIBRARY_PATH"))
-            (setenv "CMAKE_INCLUDE_PATH" (getenv "CPATH")))
+            (setenv "CMAKE_INCLUDE_PATH" (getenv "C_INCLUDE_PATH")))
           (alist-replace 'build
             (lambda* (#:key inputs outputs #:allow-other-keys)
               (let*
diff --git a/gnu/packages/webkit.scm b/gnu/packages/webkit.scm
index 0706d92c36..dd05446603 100644
--- a/gnu/packages/webkit.scm
+++ b/gnu/packages/webkit.scm
@@ -81,7 +81,7 @@
             ;; that it will be in the same directory as gstreamer's header
             ;; files.
             (setenv "CPATH"
-                    (string-append (getenv "CPATH")
+                    (string-append (getenv "C_INCLUDE_PATH")
                                    ":"
                                    (assoc-ref inputs "gst-plugins-base")
                                    "/include/gstreamer-1.0")))))))
diff --git a/guix/build-system/gnu.scm b/guix/build-system/gnu.scm
index 67ae46faed..afd57668e2 100644
--- a/guix/build-system/gnu.scm
+++ b/guix/build-system/gnu.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -284,7 +284,8 @@ standard packages used as implicit inputs of the GNU build system."
                     (parallel-tests? #t)
                     (patch-shebangs? #t)
                     (strip-binaries? #t)
-                    (strip-flags ''("--strip-debug"))
+                    (strip-flags ''("--strip-debug"
+                                    "--enable-deterministic-archives"))
                     (strip-directories ''("lib" "lib64" "libexec"
                                           "bin" "sbin"))
                     (validate-runpath? #t)
@@ -419,7 +420,8 @@ is one of `host' or `target'."
                           (parallel-build? #t) (parallel-tests? #t)
                           (patch-shebangs? #t)
                           (strip-binaries? #t)
-                          (strip-flags ''("--strip-debug"))
+                          (strip-flags ''("--strip-debug"
+                                          "--enable-deterministic-archives"))
                           (strip-directories ''("lib" "lib64" "libexec"
                                                 "bin" "sbin"))
                           (validate-runpath? #t)
diff --git a/guix/build/gnu-build-system.scm b/guix/build/gnu-build-system.scm
index ff7646b22c..2abaa6efdc 100644
--- a/guix/build/gnu-build-system.scm
+++ b/guix/build/gnu-build-system.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -39,6 +39,13 @@
 ;;
 ;; Code:
 
+(define* (set-SOURCE-DATE-EPOCH #:rest _)
+  "Set the 'SOURCE_DATE_EPOCH' environment variable.  This is used by tools
+that incorporate timestamps as a way to tell them to use a fixed timestamp.
+See https://reproducible-builds.org/specs/source-date-epoch/."
+  (setenv "SOURCE_DATE_EPOCH" "1")
+  #t)
+
 (define (first-subdirectory dir)
   "Return the path of the first sub-directory of DIR."
   (file-system-fold (lambda (path stat result)
@@ -329,7 +336,8 @@ makefiles."
                 (objcopy-command (if target
                                      (string-append target "-objcopy")
                                      "objcopy"))
-                (strip-flags '("--strip-debug"))
+                (strip-flags '("--strip-debug"
+                               "--enable-deterministic-archives"))
                 (strip-directories '("lib" "lib64" "libexec"
                                      "bin" "sbin"))
                 #:allow-other-keys)
@@ -367,7 +375,7 @@ makefiles."
     ;; `bfd_fill_in_gnu_debuglink_section' function.)  No reference to
     ;; DEBUG-OUTPUT is kept because bfd keeps only the basename of the debug
     ;; file.
-    (zero? (system* objcopy-command
+    (zero? (system* objcopy-command "--enable-deterministic-archives"
                     (string-append "--add-gnu-debuglink="
                                    (debug-file file))
                     file)))
@@ -548,7 +556,7 @@ DOCUMENTATION-COMPRESSOR-FLAGS."
   ;; Standard build phases, as a list of symbol/procedure pairs.
   (let-syntax ((phases (syntax-rules ()
                          ((_ p ...) `((p . ,p) ...)))))
-    (phases set-paths install-locale unpack
+    (phases set-SOURCE-DATE-EPOCH set-paths install-locale unpack
             patch-usr-bin-file
             patch-source-shebangs configure patch-generated-file-shebangs
             build check install
diff --git a/guix/build/haskell-build-system.scm b/guix/build/haskell-build-system.scm
index 4506e96af9..8e2aee381d 100644
--- a/guix/build/haskell-build-system.scm
+++ b/guix/build/haskell-build-system.scm
@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
+;;; Copyright © 2015 Eric Bavier <bavier@member.fsf.org>
 ;;; Copyright © 2015 Paul van der Walt <paul@denknerd.org>
 ;;;
 ;;; This file is part of GNU Guix.
@@ -25,6 +26,7 @@
   #:use-module (ice-9 rdelim)
   #:use-module (ice-9 regex)
   #:use-module (ice-9 match)
+  #:use-module (ice-9 vlist)
   #:export (%standard-phases
             haskell-build))
 
@@ -78,6 +80,7 @@ and parameters ~s~%"
                        (((_ . dir) ...)
                         dir)
                        (_ '())))
+         (ghc-path (getenv "GHC_PACKAGE_PATH"))
          (params (append `(,(string-append "--prefix=" out))
                          `(,(string-append "--libdir=" (or lib out) "/lib"))
                          `(,(string-append "--bindir=" (or bin out) "/bin"))
@@ -97,6 +100,10 @@ and parameters ~s~%"
                              '("--enable-tests")
                              '())
                          configure-flags)))
+    ;; Cabal errors if GHC_PACKAGE_PATH is set during 'configure', so unset
+    ;; and restore it.
+    (unsetenv "GHC_PACKAGE_PATH")
+
     ;; For packages where the Cabal build-type is set to "Configure",
     ;; ./configure will be executed.  In these cases, the following
     ;; environment variable is needed to be able to find the shell executable.
@@ -105,7 +112,9 @@ and parameters ~s~%"
     ;; <https://www.haskell.org/cabal/users-guide/developing-packages.html>.
     (when (file-exists? "configure")
       (setenv "CONFIG_SHELL" "sh"))
-    (run-setuphs "configure" params)))
+    (run-setuphs "configure" params)
+
+    (setenv "GHC_PACKAGE_PATH" ghc-path)))
 
 (define* (build #:rest empty)
   "Build a given Haskell package."
@@ -143,6 +152,12 @@ first match and return the content of the group."
       (format #t
               "Compiler ~a not supported~%" name-version)))))
 
+;;; TODO: Move this to (guix build utils)?
+(define-syntax-rule (with-null-error-port exp)
+  "Evaluate EXP with the error port pointing to the bit bucket."
+  (with-error-to-port (%make-void-port "w")
+    (lambda () exp)))
+
 (define (make-ghc-package-database system inputs outputs)
   "Generate the GHC package database."
   (let* ((haskell  (assoc-ref inputs "haskell"))
@@ -150,44 +165,89 @@ first match and return the content of the group."
                        (((_ . dir) ...)
                         dir)
                        (_ '())))
-         (conf-dirs (search-path-as-list
-                     `(,(string-append "lib/"
-                                       (package-name-version haskell)
-                                       "/package.conf.d"))
-                     input-dirs))
+         ;; Silence 'find-files' (see 'evaluate-search-paths')
+         (conf-dirs (with-null-error-port
+                     (search-path-as-list
+                      `(,(string-append "lib/" (package-name-version haskell)))
+                      input-dirs #:pattern ".*\\.conf.d$")))
          (conf-files (append-map (cut find-files <> "\\.conf$") conf-dirs)))
     (mkdir-p %tmp-db-dir)
     (for-each (lambda (file)
-                (copy-file file
-                           (string-append %tmp-db-dir "/" (basename file))))
+                (let ((dest (string-append %tmp-db-dir "/" (basename file))))
+                  (unless (file-exists? dest)
+                    (copy-file file dest))))
               conf-files)
     (zero? (system* "ghc-pkg"
                     (string-append "--package-db=" %tmp-db-dir)
                     "recache"))))
 
 (define* (register #:key name system inputs outputs #:allow-other-keys)
-  "Generate the compiler registration file for a given Haskell package.  Don't
-generate the cache as it would clash in user profiles."
+  "Generate the compiler registration and binary package database files for a
+given Haskell package."
+
+  (define (conf-depends conf-file)
+    ;; Return a list of pkg-ids from the "depends" field in CONF-FILE
+    (let ((port (open-input-file conf-file))
+          (field-rx (make-regexp "^(.*):")))
+      (let loop ((collecting #f)
+                 (deps '()))
+        (let* ((line (read-line port))
+               (field (and=> (regexp-exec field-rx line)
+                             (cut match:substring <> 1))))
+          (cond
+           ((and=> field (cut string=? <> "depends"))
+            ;; The first dependency is listed on the same line as "depends:",
+            ;; so drop those characters.  A line may list more than one .conf.
+            (let ((d (string-tokenize (string-drop line 8))))
+              (loop #t (append d deps))))
+           ((and collecting field)
+            (begin
+              (close-port port)
+              (reverse! deps)))
+           (collecting
+            (loop #t (append (string-tokenize line) deps)))
+           (else (loop #f deps)))))))
+
+  (define (install-transitive-deps conf-file src dest)
+    ;; Copy .conf files from SRC to DEST for dependencies in CONF-FILE, and
+    ;; their dependencies, etc.
+    (let loop ((seen vlist-null)
+               (lst (conf-depends conf-file)))
+      (match lst
+        (() #t)                         ;done
+        ((id . tail)
+         (if (not (vhash-assoc id seen))
+             (let ((dep-conf  (string-append src  "/" id ".conf"))
+                   (dep-conf* (string-append dest "/" id ".conf")))
+               (copy-file dep-conf dep-conf*) ;XXX: maybe symlink instead?
+               (loop (vhash-cons id #t seen)
+                     (append lst (conf-depends dep-conf))))
+             (loop seen tail))))))
+
   (let* ((out (assoc-ref outputs "out"))
          (haskell  (assoc-ref inputs "haskell"))
          (lib (string-append out "/lib"))
          (config-dir (string-append lib "/"
                                     (package-name-version haskell)
-                                    "/package.conf.d"))
+                                    "/" name ".conf.d"))
          (id-rx (make-regexp "^id: *(.*)$"))
          (config-file (string-append out "/" name ".conf"))
          (params
           (list (string-append "--gen-pkg-config=" config-file))))
     (run-setuphs "register" params)
     ;; The conf file is created only when there is a library to register.
-    (when (file-exists? config-file)
-      (mkdir-p config-dir)
-      (let ((config-file-name+id
-             (call-with-ascii-input-file config-file (cut grep id-rx <>))))
-        (rename-file config-file
-                     (string-append config-dir "/" config-file-name+id
-                                    ".conf"))))
-    #t))
+    (or (not (file-exists? config-file))
+        (begin
+          (mkdir-p config-dir)
+          (let* ((config-file-name+id
+                  (call-with-ascii-input-file config-file (cut grep id-rx <>))))
+            (install-transitive-deps config-file %tmp-db-dir config-dir)
+            (rename-file config-file
+                         (string-append config-dir "/"
+                                        config-file-name+id ".conf"))
+            (zero? (system* "ghc-pkg"
+                            (string-append "--package-db=" config-dir)
+                            "recache")))))))
 
 (define* (check #:key tests? test-target #:allow-other-keys)
   "Run the test suite of a given Haskell package."
diff --git a/guix/build/python-build-system.scm b/guix/build/python-build-system.scm
index 8025b7fec6..9109fb4ac7 100644
--- a/guix/build/python-build-system.scm
+++ b/guix/build/python-build-system.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013, 2015 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2013, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2013 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
 ;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
@@ -136,18 +136,11 @@ installed with setuptools."
                #t))
     #t))
 
-(define* (set-SOURCE-DATE-EPOCH #:rest _)
-  "Set the 'SOURCE_DATE_EPOCH' environment variable."
-  ;; Use zero as the timestamp in .pyc files so that builds are deterministic.
-  ;; TODO: Remove it when this variable is set in GNU:%STANDARD-PHASES.
-  (setenv "SOURCE_DATE_EPOCH" "1"))
-
 (define %standard-phases
   ;; 'configure' and 'build' phases are not needed.  Everything is done during
   ;; 'install'.
   (modify-phases gnu:%standard-phases
     (add-after 'unpack 'ensure-no-mtimes-pre-1980 ensure-no-mtimes-pre-1980)
-    (add-after 'unpack 'set-SOURCE-DATE-EPOCH set-SOURCE-DATE-EPOCH)
     (delete 'configure)
     (replace 'install install)
     (replace 'check check)
diff --git a/guix/build/ruby-build-system.scm b/guix/build/ruby-build-system.scm
index 6439bf69eb..a4ac3b307c 100644
--- a/guix/build/ruby-build-system.scm
+++ b/guix/build/ruby-build-system.scm
@@ -27,7 +27,8 @@
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-26)
   #:export (%standard-phases
-            ruby-build))
+            ruby-build
+            gem-home))
 
 ;; Commentary:
 ;;
@@ -141,3 +142,13 @@ GEM-FLAGS are passed to the 'gem' invokation, if present."
 (define* (ruby-build #:key inputs (phases %standard-phases)
                      #:allow-other-keys #:rest args)
   (apply gnu:gnu-build #:inputs inputs #:phases phases args))
+
+(define (gem-home store-path ruby-version)
+  "Return a string to the gem home directory in the store given a STORE-PATH
+and the RUBY-VERSION used to build that ruby package"
+  (string-append
+   store-path
+   "/lib/ruby/gems/"
+   (regexp-substitute #f
+                      (string-match "^[0-9]+\\.[0-9]+" ruby-version)
+                      0 ".0")))
diff --git a/guix/build/utils.scm b/guix/build/utils.scm
index e3f9edc5b5..2988193fce 100644
--- a/guix/build/utils.scm
+++ b/guix/build/utils.scm
@@ -385,10 +385,13 @@ for under the directories designated by FILES.  For example:
   (append-map (lambda (input)
                 (append-map (lambda (file)
                               (let ((file (string-append input "/" file)))
-                                ;; XXX: By using 'find-files', we implicitly
-                                ;; assume #:type 'regular.
                                 (if pattern
-                                    (find-files file pattern)
+                                    (find-files file (lambda (file stat)
+                                                       (and stat
+                                                            (eq? type (stat:type stat))
+                                                            ((file-name-predicate pattern) file stat)))
+                                                #:stat stat
+                                                #:directories? #t)
                                     (let ((stat (stat file #f)))
                                       (if (and stat (eq? type (stat:type stat)))
                                           (list file)
diff --git a/guix/search-paths.scm b/guix/search-paths.scm
index 7fd15d440c..7a6fe67959 100644
--- a/guix/search-paths.scm
+++ b/guix/search-paths.scm
@@ -139,12 +139,6 @@ report only settings not already effective."
        (let* ((values (or (and=> (getenv variable)
                                  (cut string-tokenize* <> separator))
                           '()))
-              ;; Add a trailing slash to force symlinks to be treated as
-              ;; directories when 'find-files' traverses them.
-              (files  (if pattern
-                          (map (cut string-append <> "/") files)
-                          files))
-
               ;; XXX: Silence 'find-files' when it stumbles upon non-existent
               ;; directories (see
               ;; <http://lists.gnu.org/archive/html/guix-devel/2015-01/msg00269.html>.)