nixos/modules/common/applications/freecad.nix

{ config, pkgs, lib, ... }:
{
  options = {
    freecad = {
      enable = lib.mkEnableOption {
        description = "Enable FreeCAD";
        default = false;
      };
    };
  };
  config = lib.mkIf (config.gui.enable && config.freecad.enable) {
    environment.systemPackages = [
      pkgs.freecad
    ];
  };
}