{ config , lib , pkgs , ... }: with lib; let cfg = config.my.programs.thunar; in { options.my.programs.thunar = { enable = mkOption { default = false; type = types.bool; example = true; }; }; config = mkIf cfg.enable { environment.systemPackages = with pkgs; [ xfce.exo xfce.thunar xfce.tumbler xfce.xfconf ]; services.gvfs = { enable = true; package = lib.mkForce pkgs.gnome3.gvfs; }; }; }