these 2 derivations will be built:
  /nix/store/l93gaqkv5y8q7qizf5y97fds76p8xzim-nix-grpc-store-0.1.0.drv
  /nix/store/v9qyvv04l4ahy4l7dfxx921ka782qza3-nix-grpc-store-dispatcher.drv