these 2 derivations will be built:
  /nix/store/afr6j1rzsmwv64l37zaj33m0wjxf7nvw-nix-grpc-store-0.2.3.drv
  /nix/store/i4py5akjj4ffqpfp54wb5rr6npl6nq8r-nix-grpc-store-dispatcher.drv