these 2 derivations will be built:
  /nix/store/67a11h3akpph09mgdlmhj7sk6h5b399w-nix-grpc-store-0.2.1.drv
  /nix/store/6qmbis88snyd1h14g8z4wzsyxpwlfyls-nix-grpc-store-exit-stress.drv