these 2 derivations will be built:
  /nix/store/bvk5zffq7srzjc1dv5n4087zsdzzkk4q-iets-fuzz-diff-0.0.0.drv
  /nix/store/gxjwznzicmg5aby4qj9jgscjd5w70dml-iets-fuzz-nar-check.drv