these 2 derivations will be built:
  /nix/store/l1vhxlqhmqclr04k4y39hd6jf0b03j2p-nix-grpc-store-0.1.0.drv
  /nix/store/lsk9cjsvqzhrzhk3yxj4fnqmj63lhs90-nix-grpc-store-exit-stress.drv