$ chroot /mnt/void grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=void --recheck
!! FEHLER (Exit 1): Command '['chroot', '/mnt/void', 'grub-install', '--target=x86_64-efi', '--efi-directory=/boot/efi', '--bootloader-id=void', '--recheck']' returned non-zero exit status 1.
DETAILS: grub-install: Fehler: /usr/lib64/grub/x86_64-efi/modinfo.sh existiert nicht. Bitte geben Sie --target oder --directory an.
$ umount -R /mnt/void/sys/firmware/efi/efivars
$ umount -R /mnt/void/dev
$ umount -R /mnt/void/sys
$ umount -R /mnt/void/proc
KRITISCHER FEHLER: Command '['chroot', '/mnt/void', 'grub-install', '--target=x86_64-efi', '--efi-directory=/boot/efi', '--bootloader-id=void', '--recheck']' returned non-zero exit status 1.
Traceback (most recent call last):
  File "/usr/local/bin/installer/installation_view.py", line 87, in _run_process
    self.backend._bootloader(self.plan)
    ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/usr/local/bin/installer/installation_backend.py", line 365, in _bootloader
    if plan["uefi"]: self._run(["grub-install", "--target=x86_64-efi", "--efi-directory=/boot/efi", "--bootloader-id=void", "--recheck"], chroot=True)
                     ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/bin/installer/installation_backend.py", line 24, in _run
    res = subprocess.run(cmd, check=check, text=True, capture_output=True)
  File "/usr/lib/python3.14/subprocess.py", line 577, in run
    raise CalledProcessError(retcode, process.args,
                             output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['chroot', '/mnt/void', 'grub-install', '--target=x86_64-efi', '--efi-directory=/boot/efi', '--bootloader-id=void', '--recheck']' returned non-zero exit status 1.

$ umount -R /mnt/void/sys/firmware/efi/efivars
LOG: umount: /mnt/void/sys/firmware/efi/efivars: nicht gefunden
$ umount -R /mnt/void/dev
LOG: umount: /mnt/void/dev: nicht eingehängt
$ umount -R /mnt/void/sys
LOG: umount: /mnt/void/sys: nicht eingehängt
$ umount -R /mnt/void/proc
LOG: umount: /mnt/void/proc: nicht eingehängt