guix-package: Use `guile-final', not `guile-2.0' to build the environment.

* guix-package.in (guix-package): Use either %BOOTSTRAP-GUILE or
  GUILE-FINAL.

guix-package.in

@@ -46,7 +46,8 @@ exec ${GUILE-@GUILE@} -L "@guilemoduledir@" -l "$0"    \
   #:use-module (srfi srfi-34)
   #:use-module (srfi srfi-37)
   #:use-module (distro)
-  #:use-module (distro packages guile)
+  #:use-module ((distro packages base) #:select (guile-final))
+  #:use-module ((distro packages bootstrap) #:select (%bootstrap-guile))
   #:export (guix-package))
 
 (define %store
@@ -461,9 +462,8 @@ Install, remove, or upgrade PACKAGES in a single transaction.\n"))
           (parameterize ((%guile-for-build
                           (package-derivation %store
                                               (if (assoc-ref opts 'bootstrap?)
-                                                  (@@ (distro packages base)
-                                                      %bootstrap-guile)
-                                                  guile-2.0))))
+                                                  %bootstrap-guile
+                                                  guile-final))))
             (process-actions opts))))))
 
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