these 3 derivations will be built:
  /nix/store/d6m588rjwzp68bkwj7b54gsjkqdqng71-source.drv
  /nix/store/7wc5bva0xjzpqsh48lhxbmjpaivhbp02-iets-deps-0.1.0.drv
  /nix/store/c833bc4i246vrvqz9kz8vk2811081qgh-iets-doc-0.1.0.drv