these 2 derivations will be built:
  /nix/store/d4bvp31izn2pyi3fx6c46zar22sk6nmq-nix-grpc-store-0.2.2.drv
  /nix/store/zhi23g353rqqy9mqwvzk7gpasl0f3gyj-nix-grpc-store-dispatcher.drv