these 2 derivations will be built:
  /nix/store/41kjfp2f1hwikdrq4h2gd00wf6h16khw-cargo-vendor-dir.drv
  /nix/store/2qm8vxy5qqnwbpqfzdvfipans3xi0l4h-horae-clippy-0.1.0.drv