{
  pkgs,
  config,
  ...
}: {
  hardware.acpilight.enable = true;

  environment.systemPackages = with pkgs; [acpi];

  # handle ACPI events
  services.acpid.enable = true;

  boot = {
    kernelModules = ["acpi_call"];
    extraModulePackages = with config.boot.kernelPackages; [
      acpi_call
      cpupower
    ];
  };
}