these 2 derivations will be built:
  /nix/store/0bl7827h4v0yys28sr9xjjq36ypd2k0d-iets-conformance-adapter.drv
  /nix/store/q8vvzh2r5nq3wfri9svqhbgwww44s6cy-nix-conformance-iets.drv