these 2 derivations will be built:
  /nix/store/ryd2lgs2qx5z89wcr3bj0xkaazih6gbw-iets-conformance-adapter.drv
  /nix/store/7j7pir0dh5j7g4vpskqnri1drb54zq8f-nix-conformance-iets.drv