these 3 derivations will be built:
  /nix/store/q9la4jpcngcffxkkynyzyfhkv33hzqj9-iets-0.1.0.drv
  /nix/store/2bwmahm44icb3pg2g6s2s5d6d7wccf5s-iets-conformance-adapter.drv
  /nix/store/jxsvs7ldp5b1r7h3n6bi118g60rq2him-nix-conformance-iets.drv