bug#74711: Is grub broken and breaking Guix ?

[ngraves]

Hi Guix,

I've had a low-level btrfs failing issue once again on my main computer, 
but this time I'm almost unable to recover from it.

On my backup computer, I tried updating Guix before generating an 
installable image, and that broke my backup computer. I'm unable to 
install Guix that I broke due to the following error :
https://savannah.gnu.org/bugs/?64406

This error also breaks the possibility to roll-back, I have the exact 
same error with earlier Guix system profiles, thus I am stuck trying to 
reinstall a working system profile on my backup computer.

I'm able to build everything, but it fails when running grub-install.

I use a single LUKS device, with btrfs on top, and a carefully selected 
btrfs layout.

I'm able to fix the grub-install invocation using the prefixed 
GRUB_ENABLE_CRYPTODISK=y and running the command by hand, but utimately, 
it doesn't fix the underlying error. I'm not able to run it with this 
prefix using grub 2.06.

I've also been experiencing extremely annoying git and guile-git SSL 
certificates issues, despites the SSL_CERT_DIR and SSL_CERT_FILE being 
set properly. For some reason, I was not able to `guix pull` even on the 
official installation device on tuesday but without changing anything, 
but was able to do that on wednesday.

Here I am, 4 days later, still trying to get a proper up-to-date Guix 
working, even with 3-4 years of Guix experience. There's still some 
progress ahead ;)

I'm quite stuck now, I'll happily take any advice.

Nicolas