{ config, pkgs, ... }: { services = if config.system.gui-stuff then { xserver.enable = true; xserver.displayManager.gdm.enable = true; xserver.desktopManager.gnome.enable = true; } else {}; environment.gnome.excludePackages = ( with pkgs; if config.system.gui-stuff then [ epiphany gnome-tour ] else [] ); }