bootloader/grub: Create grub background image with ungrafted inputs.

This fixes bug https://issues.guix.gnu.org/75510.

* gnu/bootloader/grub.scm (image->png): Create the grub-image using
ungrafted inputs.

Change-Id: Ia23dd081d9711c703b7bf795dc376e024bb5caff

1 files changed, 6 insertions, 1 deletions

diff --git a/gnu/bootloader/grub.scm b/gnu/bootloader/grub.scm
index c2462d5d036..e136482c541 100644
--- a/gnu/bootloader/grub.scm
+++ b/gnu/bootloader/grub.scm
@@ -140,7 +140,12 @@ Otherwise the picture in IMAGE is just copied."
                              (svg->png #+image #$output
                                        #:width #$width
                                        #:height #$height))
-                           (copy-file #+image #$output))))))
+                           (copy-file #+image #$output))))
+                 ;; Work around a bug in grafts where different versions of
+                 ;; guile-cairo are loaded from (gnu build svg).
+                 ;; As seen in https://issues.guix.gnu.org/47115#23 and
+                 ;; in https://issues.guix.gnu.org/75510.
+                 #:options '(#:graft? #f)))
 
 (define* (grub-background-image config)
   "Return the GRUB background image defined in CONFIG or #f if none was found.