# CAD and 3d printing and everything nice { config, lib, pkgs, pkgs-unstable, user, ... }: let cfg = config.modules.devel.engineering; in { options.modules.devel.engineering.enable = lib.mkEnableOption "engineering"; config = lib.mkIf cfg.enable { environment.systemPackages = with pkgs; [ super-slicer blender ] ++ [ pkgs-unstable.freecad ]; }; }