these 2 derivations will be built:
  /nix/store/lrzb1vvbjhivka3j6vwrsp9ja6czha6g-nix-grpc-store-0.1.0.drv
  /nix/store/2pk5b7nzn3138g2b4lsam3s99q7ic0ar-nix-grpc-store-dispatcher.drv