[Sorry about the uncomplete message I (might?) have sent earlier.]

Hi,

I want to create a bootable guixsd installation for an EFI x86-64 
computer. But I don't want to use the installation disk, but create that 
from an existing guixsd system. The existing system is a BIOS system 
(and I'm running it inside qemu).

The new system will be installed on a black harddrive, so I will call it 
'black'. (But note, that I haven't connected it yet. I'm using a qcow 
image instead.) I manually partitioned the black drive, I created a fat, 
swap and ext4 partition with the same uuids as in the system 
configuration 'liteon.scm' and mounted the / and efi partition:
sdb             8:16   0 111,8G  0 disk
├─sdb1          8:17   0   549M  0 part  /mnt/boot/efi
├─sdb2          8:18   0   7,5G  0 part
└─sdb3          8:19   0 103,8G  0 part  /mnt


Inside the existing system I ran:
$ guix system init liteon.scm /mnt/
... downloaded everything. errord out because of missing rights
$ sudo guix system init liteon.scm  /mnt/
Passwort:
/gnu/store/69gsk4rzz7gfa73qpzj2rfw5hs9d3pl5-system
/gnu/store/ay76p7yzy90r0yi3fg4s8c2sg8c36j7y-grub.cfg

Betriebssystem unter „/mnt/“ wird initialisiert …
Nach „/mnt“ kopieren …
populating '/mnt'...
substitute: Liste der Substitute von „https://ci.guix.gnu.org“ wird 
aktualisiert … 100.0%
Folgende Ableitungen werden erstellt:
     /gnu/store/42afgd18szcic0hiqmqqvnvnwl7gxkd1-install-bootloader.scm.drv
     /gnu/store/akdppfv8bfyx3qzkjb2hzphlvp7ncq9r-module-import.drv
     /gnu/store/bnjl98z303ax2qx8iwai3dhgzsfnsgsm-module-import.drv

1,4 MB werden heruntergeladen
   module-import-compiled  689KiB                         2.3MiB/s 00:00 
[##################] 100.0%
   module-import-compiled  689KiB                         2.6MiB/s 00:00 
[##################] 100.0%
/gnu/store/akdppfv8bfyx3qzkjb2hzphlvp7ncq9r-module-import.drv wird 
erstellt …
/gnu/store/bnjl98z303ax2qx8iwai3dhgzsfnsgsm-module-import.drv wird 
erstellt …
/gnu/store/42afgd18szcic0hiqmqqvnvnwl7gxkd1-install-bootloader.scm.drv 
wird erstellt …
guix system: error: 
'/gnu/store/mb7sg4q398ikdlx56whp2p8msa8pyakw-grub-efi-2.04/sbin/grub-install 
--boot-directory /mnt/boot --bootloader-id=Guix --efi-directory 
/mnt/boot/efi' exited with status 1; output follows:

 
/gnu/store/mb7sg4q398ikdlx56whp2p8msa8pyakw-grub-efi-2.04/sbin/grub-install: 
Fehler: 
/gnu/store/mb7sg4q398ikdlx56whp2p8msa8pyakw-grub-efi-2.04/lib/grub/i386-pc/modinfo.sh 
existiert nicht. Bitte geben Sie --target oder --directory an.

/gnu/store/mb7...-grub-efi-2.04/lib/grub/i386-pc/ does not exist,
/gnu/store/mb7...-grub-efi-2.04/lib/grub/x86_64-efi/ does exist.

grub-install seems to want an explicit target architecture. I didn't 
find anything in the guix-doc (the bootloader documentation). So I just 
tried to manually edit and run the failing command:
$ sudo 
/gnu/store/mb7sg4q398ikdlx56whp2p8msa8pyakw-grub-efi-2.04/sbin/grub-install 
--boot-directory /mnt/boot --bootloader-id=Guix --efi-directory 
/mnt/boot/efi --target=x86_64-efi
Passwort:
x86_64-efi wird für Ihre Plattform installiert.
EFI variables are not supported on this system.
EFI variables are not supported on this system.
/gnu/store/mb7sg4q398ikdlx56whp2p8msa8pyakw-grub-efi-2.04/sbin/grub-install: 
Fehler: efibootmgr schlug beim Registrieren des Boot-Eintrags fehl: 
Datei oder Verzeichnis nicht gefunden.

Then I thought: Maybe do everythung but installing the bootloader. And 
then try to chroot into /mnt and run guix system reconfigure.

$ sudo guix system init --no-bootloader liteon.scm  /mnt/
(Unfortunately, this copies everything again. Is there a way to prevent 
this? Or did the earlier guix system everything it would do with 
--no-bootloader, before it failed installing the bootloader?)


At this point, /mnt/{bin,run} were both empty. I expected /mnt/bin/sh 
and /run/current-system to exist!?
I checked the target of /mnt/var/guix/profiles/system and ran
$ sudo chroot /mnt/ /gnu/store/87kif...-bash/bin/sh
# . /var/guix/profiles/system/profile/etc/profile

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?

Thanks,
Martin Castillo