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-rw-r--r--gnu/system.scm20
-rw-r--r--gnu/system/vm.scm10
-rw-r--r--guix/scripts/system.scm13
3 files changed, 21 insertions, 22 deletions
diff --git a/gnu/system.scm b/gnu/system.scm
index 96b3b7d0e0..1766c8f90f 100644
--- a/gnu/system.scm
+++ b/gnu/system.scm
@@ -935,21 +935,19 @@ listed in OS.  The C library expects to find it under
 (define* (operating-system-bootcfg os #:optional (old-entries '()))
   "Return the bootloader configuration file for OS.  Use OLD-ENTRIES,
 a list of <menu-entry>, to populate the \"old entries\" menu."
-  (mlet* %store-monad
-      ((root-fs ->  (operating-system-root-file-system os))
-       (root-device -> (file-system-device root-fs))
-       (params -> (operating-system-boot-parameters os root-device
-                                                    #:system-kernel-arguments?
-                                                    #t))
-       (entry -> (boot-parameters->menu-entry params))
-       (bootloader-conf -> (operating-system-bootloader os)))
+  (let* ((root-fs         (operating-system-root-file-system os))
+         (root-device     (file-system-device root-fs))
+         (params          (operating-system-boot-parameters
+                           os root-device
+                           #:system-kernel-arguments? #t))
+         (entry           (boot-parameters->menu-entry params))
+         (bootloader-conf (operating-system-bootloader os)))
     (define generate-config-file
       (bootloader-configuration-file-generator
        (bootloader-configuration-bootloader bootloader-conf)))
 
-    ;; TODO: Remove the 'lower-object' call to make it non-monadic.
-    (lower-object (generate-config-file bootloader-conf (list entry)
-                                        #:old-entries old-entries))))
+    (generate-config-file bootloader-conf (list entry)
+                          #:old-entries old-entries)))
 
 (define* (operating-system-boot-parameters os root-device
                                            #:key system-kernel-arguments?)
diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index 6064e0f899..e6f0f78120 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -648,8 +648,8 @@ to USB sticks meant to be read-only."
                                     (type file-system-type))
                                   file-systems-to-keep)))))
 
-    (mlet* %store-monad ((os-drv   (operating-system-derivation os))
-                         (bootcfg  (operating-system-bootcfg os)))
+    (mlet* %store-monad ((os-drv     (operating-system-derivation os))
+                         (bootcfg -> (operating-system-bootcfg os)))
       (if (string=? "iso9660" file-system-type)
           (iso9660-image #:name name
                          #:file-system-label root-label
@@ -713,7 +713,7 @@ of the GNU system as described by OS."
                                   file-systems-to-keep)))))
     (mlet* %store-monad
         ((os-drv      (operating-system-derivation os))
-         (bootcfg     (operating-system-bootcfg os)))
+         (bootcfg ->  (operating-system-bootcfg os)))
       (qemu-image  #:os-drv os-drv
                    #:bootcfg-drv bootcfg
                    #:bootloader (bootloader-configuration-bootloader
@@ -827,8 +827,8 @@ bootloader refers to: OS kernel, initrd, bootloader data, etc."
     ;; Use a fixed UUID to improve determinism.
     (operating-system-uuid os 'dce))
 
-  (mlet* %store-monad ((os-drv   (operating-system-derivation os))
-                       (bootcfg  (operating-system-bootcfg os)))
+  (mlet* %store-monad ((os-drv     (operating-system-derivation os))
+                       (bootcfg -> (operating-system-bootcfg os)))
     ;; XXX: When FULL-BOOT? is true, we end up creating an image that contains
     ;; BOOTCFG and all its dependencies, including the output of OS-DRV.
     ;; This is more than needed (we only need the kernel, initrd, GRUB for its
diff --git a/guix/scripts/system.scm b/guix/scripts/system.scm
index 9ba9428a08..c0f16cb2a7 100644
--- a/guix/scripts/system.scm
+++ b/guix/scripts/system.scm
@@ -858,12 +858,13 @@ static checks."
               (return #f))))
        (bootcfg  (if (eq? 'container action)
                      (return #f)
-                     (operating-system-bootcfg
-                      os
-                      (if (eq? 'init action)
-                          '()
-                          (map boot-parameters->menu-entry
-                               (profile-boot-parameters))))))
+                     (lower-object
+                      (operating-system-bootcfg
+                       os
+                       (if (eq? 'init action)
+                           '()
+                           (map boot-parameters->menu-entry
+                                (profile-boot-parameters)))))))
        (bootcfg-file -> (bootloader-configuration-file bootloader))
        (bootloader-installer
         (let ((installer (bootloader-installer bootloader))