these 2 derivations will be built:
  /nix/store/wpnw0lhgpx5i1sag5pk9c336sakn4jbw-cargo-vendor-dir.drv
  /nix/store/3cszqpbc9pggw1ardz7fsc02g4x6zh5i-subportal-server-0.1.0.drv