these 3 derivations will be built:
  /nix/store/a2s1gc2zx84mnpk27lma775jckprbbfj-iets-0.1.0.drv
  /nix/store/sb077lg833wpka9zmflg63g64q0vwfva-iets-conformance-adapter.drv
  /nix/store/1hnssh3kpq1pzhjk807s6xxp35c5isd6-nix-conformance-iets.drv