{ lib, config, ... }: {
  options = {
    environment.graphical.theme = with lib; {
      name = mkOption { type = types.str; };
      light = mkOption {
        default = false;
        type = types.bool;
      };
    };
  };

  config = let
    theme =
      config.environment.graphical.colorschemes."${config.environment.graphical.theme.name}";
  in {
    environment.graphical.theme.light = builtins.elem "--light" theme.params
      || builtins.elem "-l" theme.params;
  };
}