these 2 derivations will be built:
  /nix/store/8mbjpwv7k4hgam4lgwv3lzr7aj2ln2fc-nix-grpc-store-0.1.0.drv
  /nix/store/zdwb54il72ypplga083g6vhp0432lib6-nix-grpc-store-dispatcher.drv