these 3 derivations will be built:
  /nix/store/n2hcnclivqi1j2rnb3dza5a4xzy4a8p4-iets-0.1.0.drv
  /nix/store/gbrd22xixvxb6slp769a5jyfym417qg8-iets-conformance-adapter.drv
  /nix/store/c5lzvlrp9j2kg9v0420mxxr0c0vlp0m4-nix-conformance-iets.drv