nix-flake/modules/system/kernel.nix

{ ... }: {
  boot = {
    kernelParams = [
      #"quiet"
      "boot.shell_on_fail"
      "loglevel=3"
      "rd.systemd.show_status=true"
      #"rd.udev.log_level=3"
      "udev.log_priority=3"
    ];
  };
}