{
  pkgs,
  lib,
  config,
  ...
}:
{

  options.bchmnn = {

    power = {
      tlp = {
        settings = lib.mkOption {
          type =
            with lib.types;
            attrsOf (oneOf [
              bool
              int
              float
              str
              (listOf str)
            ]);
          default = {
            # performance | powersave
            CPU_SCALING_GOVERNOR_ON_AC = "performance";
            CPU_SCALING_GOVERNOR_ON_BAT = "powersave";
            # performance | balance_performance | default | balance_power | power
            CPU_ENERGY_PERF_POLICY_ON_AC = "performance";
            CPU_ENERGY_PERF_POLICY_ON_BAT = "power";
            # performance | balanced | low-power
            PLATFORM_PROFILE_ON_AC = "performance";
            PLATFORM_PROFILE_ON_BAT = "low-power";
            CPU_MIN_PERF_ON_AC = 0;
            CPU_MAX_PERF_ON_AC = 100;
            CPU_MIN_PERF_ON_BAT = 0;
            CPU_MAX_PERF_ON_BAT = 100;
          };
        };
      };
    };
  };

  config = {
    powerManagement = {
      enable = true;
    };

    services.tlp = {
      enable = !builtins.elem "gnome" config.bchmnn.gui.flavour;
      settings = config.bchmnn.power.tlp.settings;
    };

    environment.systemPackages = with pkgs; [ powertop ];
  };
}