{ config, pkgs, lib, ... }: let cfg = config.my.roles.torrent; in { options.my.roles.torrent.enable = lib.mkEnableOption "Enable torrent support."; # TODO: do something about systems without GUI (i don't use any at the moment) config = lib.mkIf (cfg.enable) { environment.systemPackages = with pkgs; [ (transmission.override { enableGTK3 = true; }) ]; }; }