these 2 derivations will be built:
  /nix/store/b5w2jmqyk14fyq3dzkqrvmvlgs9hmii4-cargo-vendor-dir.drv
  /nix/store/kxy73z7da8p2rnhkzxz51f4m3i9n59qk-horae-clippy-0.1.0.drv