these 2 derivations will be built:
  /nix/store/vv5fvy537wawfsyam9c1rqiy6a2aqy9l-iets-conformance-adapter.drv
  /nix/store/5b7fp7a2p9kh650y1vdpmbibgiqv3gx8-nix-conformance-iets.drv