these 2 derivations will be built:
  /nix/store/rd9drmj1714rhfxbaic3jhkfbphj2718-nix-grpc-store-0.1.0-beta.3.drv
  /nix/store/kixhg3jbzs5jrblmpcmn7xizv43wr6ds-nix-grpc-store-dispatcher.drv