nixfiles/hosts/hetzner-vm/hardware.nix

{...}: {
  boot.loader = {
    grub = {
      enable = true;
      device = "/dev/sda";
    };
  };

  boot.initrd.kernelModules = ["nvme"];

  fileSystems."/" = {
    device = "/dev/sda1";
    fsType = "ext4";
  };
}