{
  boot.loader = {
    grub = {
      device = "nodev";
      enable = true;
      efiSupport = true;
      extraEntries = ''
        menuentry "Guix" {
          search --set=drive1 --fs-uuid F425-55BA
          chainloader ($drive1)//EFI/Guix/grubx64.efi
        }
      '';
    };
    efi.canTouchEfiVariables = true;
  };
}