these 2 derivations will be built:
  /nix/store/0hhg4qx8w5myvmpnj8hbsvyr63q4hab6-cargo-vendor-dir.drv
  /nix/store/4yqnh7zp8qckba7c5qqrabk6dr39v29d-horae-clippy-0.1.0.drv