these 4 derivations will be built:
  /nix/store/5prkqrlib06lkqn7ln50n0jcrws61bdb-source.drv
  /nix/store/1mgg6g3kl3wxqjwrqh88cvlxxya34d9k-treehouse-3.1.7-go-modules.drv
  /nix/store/8s23haasx9rqm392kksnf34ry35wbzyc-treehouse-3.1.7.drv
  /nix/store/yc9jszdq6njlqpssz8jm2ljqnvflwf82-check-treehouse.drv