these 4 derivations will be built:
  /nix/store/fm2bki4ds06lj6f3czs3m472jwdhk81a-iets-fuzz-diff-0.0.0.drv
  /nix/store/va00fmn2j9rikfwnfymdvj8c2qpgay2f-iets-0.2.0.drv
  /nix/store/wncib7i4v56kj1b2m8vc36g0q0xc28h2-iets-conformance-adapter.drv
  /nix/store/mdyk4y2ir2gbk8rs2rc7g8q7g45x8ykg-nix-conformance-iets.drv