these 4 derivations will be built:
  /nix/store/azsf2v8kbvgr89r4cyfz07yl5fflp7ww-iets-fuzz-diff-0.0.0.drv
  /nix/store/mwgq3fmpzchhndasxkhhlmjmvd5rfj4r-iets-0.2.0.drv
  /nix/store/s11znvkian9nscq8dwc6kkfnxfp2b9y8-iets-conformance-adapter.drv
  /nix/store/85vnk8s5c2i96aw011ykblvig6xkclpq-nix-conformance-iets.drv