these 2 derivations will be built:
  /nix/store/z4z5qd9f8ddbqca0ig9lxsg9jpkss4zx-iets-deps-0.1.0.drv
  /nix/store/4f45kbva4xl66klqh1fvyk4wr5l5aa1l-iets-doc-0.1.0.drv