I'm back.

On 17.02.22 01:40, Martin Castillo wrote:
> But here I did not know how to proceed? There is no grub-install in this 
> chrooted /gnu/store(, which is weird, because a complete system should 
> contain all files to update itself, right?).
> 
> What am I missing?
> Or can you only create an EFI system installation when you're already 
> running on one?

So I ran the install image in qemu with EFI firmware and ran through the 
graphical installer. The guided graphical install failed, manually 
running guix system init worked. You can find the outputs under [1].
Looks like a bug, but I have no idea how to give you more info.

To summarize:

1. I wish it would be possible to system init an efi system from a bios 
system.

2. The guided gui installer should not fail when installing inside qemu 
with EFI. The qemu cmdline was
$ qemu-system-x86_64 -m 2048 -smp 3 -enable-kvm \
         -bios /usr/share/edk2-ovmf/x64/OVMF.fd \
   -nic user,model=virtio-net-pci -boot menu=on,order=d \
   -drive file=/dev/nbd1 \
   -drive media=cdrom,file=guix-system-install-1.3.0.x86_64-linux.iso


Martin

[1]: https://seafile.zfn.uni-bremen.de/d/e9acc264718f4ae7b703/