these 2 derivations will be built:
  /nix/store/r3r2pa45m47w5bj8isbgl7wf1iwglf5f-nix-grpc-store-0.2.2.drv
  /nix/store/2w7cjlbqnf92a0ya333xqfc0cqg6728d-nix-grpc-store-dispatcher.drv