these 2 derivations will be built:
  /nix/store/18wsisl7k8qdxaz1xgzq97z0i561l1fg-nix-grpc-store-0.2.3.drv
  /nix/store/dyzwwhpzks659y9d970xnmzwihr3f3hk-nix-grpc-store-dispatcher.drv