these 3 derivations will be built:
  /nix/store/p2hnlsi6hnqlj3pi8kdy86c2c0rj01lm-iets-0.1.0.drv
  /nix/store/z1ik1k0md738llb9dckf32d1hh3a67hp-iets-conformance-adapter.drv
  /nix/store/9h16knwyszck5vv16k1dsbq72i9wa3df-nix-conformance-iets.drv