bug#49145: Solved, I guess

[HiPhish]

I recently had to re-install my system due to a data loss. When I tried 
building Guix on the fresh Void install everything worked out, so I guess this 
issue can be closed now. I still don't know what went wrong, but it must have 
been something peculiar about my previous setup, either on the Guix side or on 
the Void side, or the bug simply got fixed upstream. I don't know.