these 4 derivations will be built:
  /nix/store/2ariqhxlsgnaq5fs1dyivh470nzyzkp6-iets-fuzz-diff-0.0.0.drv
  /nix/store/2csq5hk0ipwdngmyhc5vfig7j8wrs3jk-iets-0.1.0.drv
  /nix/store/mb4k6ky3s2gdrxk2y1mhzi1jdsgia85g-iets-conformance-adapter.drv
  /nix/store/b1xmnw7lmw2h3spidda7wjq7l7ssx4gb-nix-conformance-iets.drv