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-rw-r--r--gnu/packages/bioinformatics.scm8
-rw-r--r--gnu/packages/games.scm3
-rw-r--r--gnu/packages/maths.scm3
-rw-r--r--gnu/packages/mpi.scm6
-rw-r--r--gnu/packages/networking.scm3
-rw-r--r--gnu/packages/synergy.scm3
6 files changed, 8 insertions, 18 deletions
diff --git a/gnu/packages/bioinformatics.scm b/gnu/packages/bioinformatics.scm
index 92bc532196..0dcbb94666 100644
--- a/gnu/packages/bioinformatics.scm
+++ b/gnu/packages/bioinformatics.scm
@@ -3260,9 +3260,7 @@ comment or quality sections.")
            (lambda* (#:key inputs #:allow-other-keys)
              ;; Ensure that Eigen headers can be found
              (setenv "CPLUS_INCLUDE_PATH"
-                     (string-append (getenv "CPLUS_INCLUDE_PATH")
-                                    ":"
-                                    (assoc-ref inputs "eigen")
+                     (string-append (assoc-ref inputs "eigen")
                                     "/include/eigen3"))
              #t))
          (add-before 'build 'bin-mkdir
@@ -11697,9 +11695,7 @@ bytes of memory space, where n is the length of the string.")
 
              ;; Ensure that Eigen headers can be found
              (setenv "CPLUS_INCLUDE_PATH"
-                     (string-append (getenv "CPLUS_INCLUDE_PATH")
-                                    ":"
-                                    (assoc-ref inputs "eigen")
+                     (string-append (assoc-ref inputs "eigen")
                                     "/include/eigen3"))
              #t)))))
     (inputs
diff --git a/gnu/packages/games.scm b/gnu/packages/games.scm
index b6a63aba02..6e54abc5d0 100644
--- a/gnu/packages/games.scm
+++ b/gnu/packages/games.scm
@@ -4175,8 +4175,7 @@ over 100 user-created campaigns.")
                      (string-append (assoc-ref inputs "sdl-union")
                                     "/include/SDL:"
                                     (assoc-ref inputs "python")
-                                    "/include/python2.7:"
-                                    (getenv "CPLUS_INCLUDE_PATH")))
+                                    "/include/python2.7"))
              (substitute* "src/main/main.cpp"
                (("#include <SDL.h>" line)
                 (string-append line "
diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
index df8bad13e0..3f9cd8be6e 100644
--- a/gnu/packages/maths.scm
+++ b/gnu/packages/maths.scm
@@ -4740,8 +4740,7 @@ assemble global function spaces on finite-element grids.")
          (add-after 'build 'build-tests
            (lambda* (#:key inputs make-flags #:allow-other-keys)
              (setenv "CPLUS_INCLUDE_PATH"
-                     (string-append (assoc-ref inputs "dune-grid") "/share:"
-                                    (getenv "CPLUS_INCLUDE_PATH")))
+                     (string-append (assoc-ref inputs "dune-grid") "/share"))
              (apply invoke "make" "build_tests" make-flags))))))
     (inputs
      `(("dune-common" ,dune-common)
diff --git a/gnu/packages/mpi.scm b/gnu/packages/mpi.scm
index c9cd7b1382..c02e1d2e2b 100644
--- a/gnu/packages/mpi.scm
+++ b/gnu/packages/mpi.scm
@@ -217,12 +217,10 @@ bind processes, and much more.")
                     (lambda* (#:key inputs #:allow-other-keys)
                       (setenv "C_INCLUDE_PATH"
                               (string-append (assoc-ref inputs "opensm")
-                                             "/include/infiniband/:"
-                                             (getenv "C_INCLUDE_PATH")))
+                                             "/include/infiniband"))
                       (setenv "CPLUS_INCLUDE_PATH"
                               (string-append (assoc-ref inputs "opensm")
-                                             "/include/infiniband/:"
-                                             (getenv "CPLUS_INCLUDE_PATH")))
+                                             "/include/infiniband"))
                       #t))
                   (add-before 'build 'remove-absolute
                     (lambda _
diff --git a/gnu/packages/networking.scm b/gnu/packages/networking.scm
index 53c11f6d95..ce9afaf16d 100644
--- a/gnu/packages/networking.scm
+++ b/gnu/packages/networking.scm
@@ -2289,8 +2289,7 @@ Ethernet and TAP interfaces is supported.  Packet capture is also supported.")
                      (string-append (assoc-ref inputs "curl") "/include:"
                                     (assoc-ref inputs "libpcap") "/include:"
                                     (assoc-ref inputs "openssl") "/include:"
-                                    (assoc-ref inputs "zlib") "/include:"
-                                    (getenv "C_INCLUDE_PATH")))
+                                    (assoc-ref inputs "zlib") "/include"))
              #t)))))
     (home-page "https://github.com/ZerBea/hcxtools")
     (synopsis "Capture wlan traffic to hashcat and John the Ripper")
diff --git a/gnu/packages/synergy.scm b/gnu/packages/synergy.scm
index da8787285f..9de3ee57e4 100644
--- a/gnu/packages/synergy.scm
+++ b/gnu/packages/synergy.scm
@@ -63,8 +63,7 @@
            (lambda* (#:key inputs #:allow-other-keys)
              (setenv "CPLUS_INCLUDE_PATH"
                      (string-append (assoc-ref inputs "avahi")
-                                    "/include/avahi-compat-libdns_sd/:"
-                                    (getenv "CPLUS_INCLUDE_PATH")))
+                                    "/include/avahi-compat-libdns_sd"))
              ;; See https://github.com/symless/synergy-core/pull/6359/
              (substitute* "src/gui/src/ScreenSetupView.cpp"
                (("#include <QtGui>" m)