these 3 derivations will be built:
  /nix/store/0fvbs6h7yppdlf292s314rawsl7lls98-iets-0.1.0.drv
  /nix/store/wj98ijfaf97c82v7ydlwwy3jgqy5bf2k-iets-conformance-adapter.drv
  /nix/store/yjdx8vxns92g4b2f2jw0zsjkx574cgzg-nix-conformance-iets.drv