these 2 derivations will be built:
  /nix/store/fs725nd5hfnf06wv1rzmqy92zl85wbgv-cargo-vendor-dir.drv
  /nix/store/6zq0ik275h924wdkb5d8c5wphx988f1j-subportal-server-0.1.0.drv