these 2 derivations will be built:
  /nix/store/71sypv5fgdvw9xglqsb57z0rqlfmyicj-cargo-vendor-dir.drv
  /nix/store/zyv142vqk04wpdqrn4n1ir70d8inl3g2-horae-clippy-0.1.0.drv