{pkgs, ...}: {
  environment.systemPackages = [pkgs.brightnessctl];

  # brightness keys, handled at the evdev level so they work in any WM
  services.actkbd = {
    enable = true;
    bindings = [
      {
        # XF86MonBrightnessUp
        keys = [225];
        events = ["key"];
        command = "${pkgs.brightnessctl}/bin/brightnessctl set 5%+";
      }
      {
        # XF86MonBrightnessDown
        keys = [224];
        events = ["key"];
        command = "${pkgs.brightnessctl}/bin/brightnessctl set 5%-";
      }
    ];
  };

  services.displayManager.ly = {
    enable = true;
    x11Support = true;
  };

  services.xserver = {
    enable = true;
    xkb = {
      layout = "us";
      options = "caps:escape";
    };
  };
}