system: Stop using canonical-package.

Usage of canonical-package outside of thunked fields breaks cross-compilation,
see: https://lists.gnu.org/archive/html/guix-devel/2019-12/msg00410.html.

* gnu/installer.scm (installer-program): Remove canonical-package.
* gnu/services/base.scm (<nscd-cache>): Ditto,
(%base-services): ditto.
* gnu/services/xorg.scm: Remove useless canonical-package import.
* gnu/system.scm (%base-packages): Remove canonical-package.
* gnu/system/install.scm (%installation-services): Ditto,
(installation-os): ditto.
* gnu/system/locale.scm (single-locale-directory): Ditto.

gnu/installer.scm

@@ -291,18 +291,18 @@ (define init-gettext
   (define set-installer-path
     ;; Add the specified binary to PATH for later use by the installer.
     #~(let* ((inputs
-              '#$(append (list bash ;start subshells
-                               connman ;call connmanctl
-                               cryptsetup
-                               dosfstools ;mkfs.fat
-                               e2fsprogs ;mkfs.ext4
-                               btrfs-progs ;mkfs.btrfs
-                               jfsutils ;jfs_mkfs
-                               kbd ;chvt
-                               guix ;guix system init call
-                               util-linux ;mkwap
-                               shadow)
-                         (map canonical-package (list coreutils)))))
+              '#$(list bash ;start subshells
+                       connman ;call connmanctl
+                       cryptsetup
+                       dosfstools ;mkfs.fat
+                       e2fsprogs ;mkfs.ext4
+                       btrfs-progs
+                       jfsutils ;jfs_mkfs
+                       kbd ;chvt
+                       guix ;guix system init call
+                       util-linux ;mkwap
+                       shadow
+                       coreutils)))
         (with-output-to-port (%make-void-port "w")
           (lambda ()
             (set-path-environment-variable "PATH" '("bin" "sbin") inputs)))))

gnu/services/base.scm

@@ -45,7 +45,7 @@ (define-module (gnu services base)
                 #:select (alsa-utils crda eudev e2fsprogs fuse gpm kbd lvm2 rng-tools))
   #:use-module (gnu packages bash)
   #:use-module ((gnu packages base)
-                #:select (canonical-package coreutils glibc glibc-utf8-locales))
+                #:select (coreutils glibc glibc-utf8-locales))
   #:use-module (gnu packages package-management)
   #:use-module ((gnu packages gnupg) #:select (guile-gcrypt))
   #:use-module (gnu packages linux)
@@ -1212,7 +1212,7 @@ (define-record-type* <nscd-configuration> nscd-configuration
   (name-services nscd-configuration-name-services ;list of <packages>
                  (default '()))
   (glibc      nscd-configuration-glibc            ;<package>
-              (default (canonical-package glibc))))
+              (default glibc)))
 
 (define-record-type* <nscd-cache> nscd-cache make-nscd-cache
   nscd-cache?
@@ -2445,9 +2445,7 @@ (define %base-services
                    (rules (list lvm2 fuse alsa-utils crda))))
 
         (service special-files-service-type
-                 `(("/bin/sh" ,(file-append (canonical-package bash)
-                                            "/bin/sh"))
-                   ("/usr/bin/env" ,(file-append (canonical-package coreutils)
-                                                 "/bin/env"))))))
+                 `(("/bin/sh" ,(file-append bash "/bin/sh"))
+                   ("/usr/bin/env" ,(file-append coreutils "/bin/env"))))))
 
 ;;; base.scm ends here

gnu/services/xorg.scm

@@ -29,7 +29,7 @@ (define-module (gnu services xorg)
   #:use-module (gnu system keyboard)
   #:use-module (gnu services base)
   #:use-module (gnu services dbus)
-  #:use-module ((gnu packages base) #:select (canonical-package))
+  #:use-module (gnu packages base)
   #:use-module (gnu packages guile)
   #:use-module (gnu packages xorg)
   #:use-module (gnu packages fonts)

gnu/system.scm

@@ -590,18 +590,13 @@ (define %base-packages
 
          bash-completion
 
-         ;; XXX: We don't use (canonical-package guile-2.2) here because that
-         ;; would create a collision in the global profile between the GMP
-         ;; variant propagated by 'guile-final' and the GMP variant propagated
-         ;; by 'gnutls', itself propagated by 'guix'.
          guile-2.2
          guile-readline guile-colorized
 
          ;; The packages below are also in %FINAL-INPUTS, so take them from
          ;; there to avoid duplication.
-         (map canonical-package
-              (list bash coreutils findutils grep sed
-                    diffutils patch gawk tar gzip bzip2 xz lzip))))
+         (list bash coreutils findutils grep sed
+               diffutils patch gawk tar gzip bzip2 xz lzip)))
 
 (define %default-issue
   ;; Default contents for /etc/issue.

gnu/system/install.scm

@@ -384,8 +384,7 @@ (define bare-bones-os
           ;; Having /bin/sh is a good idea.  In particular it allows Tramp
           ;; connections to this system to work.
           (service special-files-service-type
-                   `(("/bin/sh" ,(file-append (canonical-package bash)
-                                              "/bin/sh"))))
+                   `(("/bin/sh" ,(file-append bash "/bin/sh"))))
 
           ;; Loopback device, needed by OpenSSH notably.
           (service static-networking-service-type
@@ -408,7 +407,7 @@ (define bare-bones-os
                    (list bare-bones-os
                          glibc-utf8-locales
                          texinfo
-                         (canonical-package guile-2.2))))))
+                         guile-2.2)))))
 
 (define %issue
   ;; Greeting.
@@ -480,7 +479,7 @@ (define installation-os
      ;; Explicitly allow for empty passwords.
      (base-pam-services #:allow-empty-passwords? #t))
 
-    (packages (cons* (canonical-package glibc) ;for 'tzselect' & co.
+    (packages (cons* glibc ;for 'tzselect' & co.
                      parted gptfdisk ddrescue
                      fontconfig
                      font-dejavu font-gnu-unifont

gnu/system/locale.scm

@@ -86,7 +86,7 @@ (define (locale-name->definition name)
      #f)))
 
 (define* (single-locale-directory locales
-                                  #:key (libc (canonical-package glibc)))
+                                  #:key (libc glibc))
   "Return a directory containing all of LOCALES for LIBC compiled.
 
 Because locale data formats are incompatible when switching from one libc to