these 2 derivations will be built:
  /nix/store/7v5b7x484hj8gki9fy3w0nxm66xm7gx0-nix-grpc-store-0.2.2.drv
  /nix/store/4fbx65dvfqvdiri52xlpzlycv5k8cvc1-nix-grpc-store-dispatcher.drv