these 2 derivations will be built:
  /nix/store/41kjfp2f1hwikdrq4h2gd00wf6h16khw-cargo-vendor-dir.drv
  /nix/store/ba6xqxipx9hs6asf8qjz1h62z4zbb1h7-horae-tests-0.1.0.drv