# Boot via coreboot's GRUB payload (e.g. libreboot default). The GRUB in the
# flash chip reads the grub.cfg that NixOS generates on disk, so GRUB here is
# config-only -- it is NOT installed to any disk MBR (`device = "nodev"`).
#
# Your coreboot grub.cfg must locate and load the on-disk config, e.g. search
# for and `configfile` /boot/grub/grub.cfg (or chainload the disk's GRUB).
{ ... }:
{
  boot.loader.grub = {
    enable = true;
    device = "nodev";
  };
}