bug#47115: Failure building grub-img.png when reconfiguring

[Jack Hill]

I believe that I have identified the problematic difference in my 
operating system config between my working and non-working hosts. After 
applying the following patch to my operating system config (good and bad 
versions attatched), I was able to successfully reconfigure with guix 
8ec0ca8faff62f19426f22aeb1bd59a8950ca05a (I was able to reproduce the 
failure with that commit on another VM):

--- bad.scm     2021-03-15 22:36:36.000000001 -0400
+++ good.scm    2021-03-15 22:37:01.000000001 -0400
@@ -79,8 +79,6 @@
                           (guix-service-type config =>
                                              (guix-configuration
                                               (inherit config)
-                                              (extra-options
-                                               '("--disable-deduplication"))
                                               (authorized-keys
                                                (cons
                                                 (local-file 
"/home/jackhill/alperton-guix-key.pub")

I am forced to conclude that running the guix-daemon with deduplication 
disabled causes this build failure. Spooky!

Best,
Jack

bad.scm
Description: Text document

good.scm
Description: Text document