{ den, modules, ... }:
{
  # Intel Mobile Gpu Management
  modules.intel-mgm = {
    nixos =
      { pkgs, ... }:
      let
        batt-gpu = pkgs.writeShellScript "batt-igpu" ''
              ${pkgs.intel-gpu-tools}/bin/intel_gpu_frequency -e
          		echo "800" > /sys/class/drm/card1/gt_boost_freq_mhz
        '';
        ac-gpu = pkgs.writeShellScript "ac-igpu" ''
              ${pkgs.intel-gpu-tools}/bin/intel_gpu_frequency -d
          		echo "2350" > /sys/class/drm/card1/gt_boost_freq_mhz
        '';
      in
      {
        systemd.services.gpu-limit-on-batt = {
          enable = true;
          description = "Using rfkill; disable all rf devices before sleeping.";
          before = [ "battery.target" ];

          serviceConfig = {
            Type = "oneshot";
            ExecStart = "${batt-gpu}";
            RemainAfterExit = true;
          };
          wantedBy = [ "battery.target" ];
          partOf = [ "battery.target" ];
        };
        systemd.services.gpu-limit-on-ac = {
          enable = true;
          description = "Using rfkill; disable all rf devices before sleeping.";
          before = [ "ac.target" ];

          serviceConfig = {
            Type = "oneshot";
            ExecStart = "${ac-gpu}";
            RemainAfterExit = true;
          };
          wantedBy = [ "ac.target" ];
          partOf = [ "ac.target" ];
        };
      };
  };
}