these 2 derivations will be built:
  /nix/store/5k7kn066z8miz8922vgwgvjjqb1fzr3h-iets-conformance-adapter.drv
  /nix/store/gg81l7ldkwxjlgin16d5f8dvwjs6r0mg-nix-conformance-iets.drv