these 2 derivations will be built:
  /nix/store/xmwm4xf6qq9p1as9qca5h4bypq12b2bk-cargo-vendor-dir.drv
  /nix/store/1a6al0aim9wf3vy6qgz3i73wlgna2dd9-horae-tests-0.1.0.drv