these 2 derivations will be built:
  /nix/store/qj3r2i9g2817nnm2xkd1vw5wz5wc4nr7-iets-conformance-adapter.drv
  /nix/store/5lfjiqyjr834bdx5mhz4730k4nppgj6d-nix-conformance-iets.drv