these 3 derivations will be built:
  /nix/store/mng788r50v43s9ii9fi3dg6ncwykmvbl-iets-0.1.0.drv
  /nix/store/bq9f772k9sw701msnahykvxg76xbj0mp-iets-conformance-adapter.drv
  /nix/store/flddsifnyflfpnbsin3f7lm0sp03g7ip-nix-conformance-iets.drv