these 2 derivations will be built:
  /nix/store/21yqxxrirxgyb8vm5gdz0c4jwzbicx8s-nix-grpc-store-0.2.0.drv
  /nix/store/i9ja18shawd25d2ahaq8k27fv8hap8g0-nix-grpc-store-dispatcher.drv