these 4 derivations will be built:
  /nix/store/jkzx1xp77s8rs8yg4dn1h8qms3scvkvh-iets-fuzz-diff-0.0.0.drv
  /nix/store/pnc4gcbvs5gwksn20hpk96r01lzngac5-iets-0.1.0.drv
  /nix/store/9rk6qhdxlmbyyn834x2i4yy8hg44jv13-iets-conformance-adapter.drv
  /nix/store/z71jlwd8axq3fxasgb5ggcmilymvi748-nix-conformance-iets.drv