these 2 derivations will be built:
  /nix/store/kxzf02hzbkjxb1hcxxabjn6x1rcbmzkn-cargo-vendor-dir.drv
  /nix/store/j7fkjv1h1zk1aq14ms41s6dmj74rpx1n-horae-clippy-0.1.0.drv