nix/module/desktop/DisplayManager.nix

{ config, lib, ... }: with lib; let
	cfg = config.module.desktop.dm;
in {
	options = {
		module.desktop.dm.enable = mkEnableOption "Display Manager.";
	};

	config = mkIf cfg.enable {
		services.xserver.enable = true;
		services.xserver.xkb = {
			layout  = config.setting.keyboard.layouts;
			options = config.setting.keyboard.options;
		};
	};
}