these 2 derivations will be built:
  /nix/store/ri3wfxbky3pdny6vy3qqbl4g7dy4qzrh-cargo-vendor-dir.drv
  /nix/store/n549bzqfv9nw3hdydi6a7g2wrdh9fzs3-horae-clippy-0.1.0.drv