these 3 derivations will be built:
  /nix/store/ird8cbnnd2vyji3hxqpal70hcjf9gh09-iets-0.1.0.drv
  /nix/store/px0484lz47k6zgwix2jby3fgsn8lzr4d-iets-conformance-adapter.drv
  /nix/store/59j29z6280cgs7y12prbfxih2h90x3kz-nix-conformance-iets.drv