these 2 derivations will be built:
  /nix/store/0xvfnl2ibv5p15m49j9fvfbra32wjy31-nix-grpc-store-0.1.0-beta.2.drv
  /nix/store/2wbwbf6s8a3xyf6k1z8bnzgvjrwm3ia9-nix-grpc-store-dispatcher.drv