these 2 derivations will be built:
  /nix/store/qspz29d3vf7rjld1ljmimsgny1ndfqaz-nix-grpc-store-0.2.3.drv
  /nix/store/7pwnlv2rsxs6idii5jjmb45114jn5ivw-nix-grpc-store-dispatcher.drv