{ lib, config, ... }: let inherit (lib) mkIf; cfgUser = config.myOptions.system.username; cfg = config.myOptions.home-manager.programs.applications.virtualbox; in { config = mkIf cfg.enable { virtualisation.virtualbox.host = { enable = true; # Don't include the Qt dependency and GUI app, # if gui is desired, it can be installed separately on a per-user basis headless = true; }; users.extraGroups.vboxusers.members = ["${cfgUser}"]; }; }