these 3 derivations will be built:
  /nix/store/89j6il9bcidqz1wk87y95kxvanyrjmxs-iets-fuzzers-0.0.0.drv
  /nix/store/pck9icfv69p8lpiqk7n5hgxi3l50119w-iets-fuzz-diff-0.0.0.drv
  /nix/store/msgyvfy0nayyirrqcw8qv8wpy22ammvq-iets-fuzz-parse-check.drv