these 3 derivations will be built:
  /nix/store/jccw7p7ig5i5dqfg3agqmkgr5qyv3q05-iets-0.1.0.drv
  /nix/store/10834mvsgmnwpq66x18l435cgh8af87b-iets-conformance-adapter.drv
  /nix/store/910bv4wva8b37kv15jfza342pxipsm1v-nix-conformance-iets.drv