these 3 derivations will be built:
  /nix/store/jqx827w7bra3w7h5mi5h64z2asi78ywy-serde_json-1.0.151.drv
  /nix/store/icy379mzwajg36dx4gc22wvlz68g0cq5-cargo-vendor-dir.drv
  /nix/store/p2wfrd77g8yrnfklkimznai192l82a9r-bob-0.1.0.drv