these 2 derivations will be built:
  /nix/store/6p9253hr19xgrzidsvc0dhzbjz2v1004-nix-grpc-store-0.2.2.drv
  /nix/store/0afg8ay0scfcg4wbxc594ghlyhgd2zya-nix-grpc-store-dispatcher.drv