these 2 derivations will be built:
  /nix/store/9c7nya2dr0kfzpkwyfs4v97qwnn33nzj-iets-conformance-adapter.drv
  /nix/store/r2qmz1w2x0r7840q6krl2f8jbps70w9l-nix-conformance-iets.drv