these 2 derivations will be built:
  /nix/store/30jqsv5215m6x4vyi7b11dv7dviqqxv8-cargo-vendor-dir.drv
  /nix/store/vf9cvdaf8bamakjqjk03s3wy7z4s3gjc-subportal-server-0.1.0.drv