these 2 derivations will be built:
  /nix/store/sc9a8qwp228m4xmianmhxc7xn8720i8x-cargo-vendor-dir.drv
  /nix/store/2q9a0dvwl062nkqf55hqygsbk1cqsfgd-horae-clippy-0.1.0.drv