Kete via 写道：
> That worked, but I had to disable UEFI boot and enable "legacy" 
> boot in the BIOS.

If this is fine for you, keep it.

> Ok, I tried running that grub-install command manually, making 
> the
> --efi-directory /mnt/boot/efi, but I got the same error.

If you would like to continue tinkering with UEFI, try invoking 
GRUB with --efi-directory /boot/efi (without changing anything 
else).  However, Guix already invokes the ‘correct’ command so 
there's likely something else not quite right.

Kind regards,

T G-R