these 2 derivations will be built:
  /nix/store/x73nr60mlq6wr2vaps7vh1k1rxy2h34w-iets-conformance-adapter.drv
  /nix/store/sbgh1mbq8w7yw3i30wgxb0c1h6il9w4b-nix-conformance-iets.drv