somehow ~git send-mail~ seems not to work as expected. Therefore, I send
this patch manually.
The patch allows us to use the menuentry configfile for grub. As I'm still
a newbie with regard to guix, I was not able to test it.
My next step will be:
- patch guix, such that grub can work with btrfs subvolumes
secure communication? GPG: 0x8C3260C01550B612E4C5730D22E42112094CE53F