these 4 derivations will be built:
  /nix/store/bz2z4sgz49aj05dc21vdcwad7f9gwlcm-iets-fuzz-diff-0.0.0.drv
  /nix/store/iyz9shbqv5wv2as3pn1mfffqrqsv1qjr-iets-0.1.0.drv
  /nix/store/k58y6p9aaqqhwwjphl72rwv4d5jfxx7d-iets-conformance-adapter.drv
  /nix/store/db2ph0jpik7k9nifqijhlv9crm7612jb-nix-conformance-iets.drv