these 3 derivations will be built:
  /nix/store/cki6gm73275drbcriq7km101ivhz265r-iets-0.1.0.drv
  /nix/store/5pdabwwpb23dzs6m1vc21g704d1fp4pi-iets-conformance-adapter.drv
  /nix/store/lv2rxahh8v6s8mydp5afaqfcjg8764id-nix-conformance-iets.drv