these 2 derivations will be built:
  /nix/store/0yznb7w3mzsd0mn0r3mnsagnh4lv1lz7-iets-conformance-adapter.drv
  /nix/store/hhpzrlzxv2xy7a52z1dq8nhmjpwiyyrs-nix-conformance-iets.drv