these 4 derivations will be built:
  /nix/store/3bbxsbsghzgfkhz5a03p8jckahds0vzm-iets-fuzz-diff-0.0.0.drv
  /nix/store/nqv9a4hzwc5a2mhfg117hzryic11ffaz-iets-0.2.0.drv
  /nix/store/0v5pg8k7ymbsmgi5bsgahdhwgx83vf6w-iets-conformance-adapter.drv
  /nix/store/r3phjxazqg9z4l57f2ya4mgszawwpv6c-nix-conformance-iets.drv