these 2 derivations will be built:
  /nix/store/0kbvbz0gs6l446qs7ww24z037iiyzai3-nix-grpc-store-0.2.2.drv
  /nix/store/b1kl718k8n82qvhm1pixrwqawjwxmri1-nix-grpc-store-dispatcher.drv