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-rw-r--r--guix/scripts/system.scm3
1 files changed, 2 insertions, 1 deletions
diff --git a/guix/scripts/system.scm b/guix/scripts/system.scm
index 57f42215ee..5737807d8b 100644
--- a/guix/scripts/system.scm
+++ b/guix/scripts/system.scm
@@ -299,7 +299,8 @@ actions."
              (mlet %store-monad ((% (switch-to-system os)))
                (when grub?
                  (unless (false-if-exception
-                          (install-grub grub.cfg device "/"))
+                          (install-grub (derivation->output-path grub.cfg)
+                                        device "/"))
                    (leave (_ "failed to install GRUB on device '~a'~%")
                           device)))
                (return #t)))