these 4 derivations will be built:
  /nix/store/db3rr6p7lvpgzsji1lbmlzs31iqyxyx5-iets-0.1.0.drv
  /nix/store/zhmrzvcs2cgkxqws2p5ggg2q09w9qrl5-iets-fuzz-diff-0.0.0.drv
  /nix/store/1ff8bd8bwnvn0993l8y4ny44r4cn8c4k-iets-conformance-adapter.drv
  /nix/store/h11rkdd8wkm3h8xcjlb3kd3h7b7zf79p-nix-conformance-iets.drv