these 2 derivations will be built:
  /nix/store/3n5b6p0ym7clyasvxjzla9h3k1pp892m-nix-grpc-store-0.2.2.drv
  /nix/store/wm6ki4q86saw1dhwvn6ifv6s8gsnb6rc-nix-grpc-store-dispatcher.drv