these 2 derivations will be built:
  /nix/store/3xqk6f67bkcs1973896m2nm9llwwhwaq-nix-grpc-store-0.1.0.drv
  /nix/store/j0l95jhz6qd07hj5x1dsph3hgb7yqzi9-nix-grpc-store-exit-stress.drv