these 4 derivations will be built:
  /nix/store/cj8hj962a6bnnhkil1704f6bcp2fz8v7-iets-0.1.0.drv
  /nix/store/nyxdcla4i0ml8d6ynzkz01qfxlkxs1h9-iets-fuzz-diff-0.0.0.drv
  /nix/store/0jnrxfkc3hdvlzwv8c0a6dch4grlhgpv-iets-conformance-adapter.drv
  /nix/store/9ph1rjil9krz5hrisdsxrkkrhcvfq298-nix-conformance-iets.drv