these 2 derivations will be built:
  /nix/store/7hi3kjncd1maw3ij4m12q7mvlvjnj660-iets-conformance-adapter.drv
  /nix/store/5sjbzwbmr6fvsmdcmkjyhzlysqhnxvgf-nix-conformance-iets.drv