these 2 derivations will be built:
  /nix/store/b70bz28c6cbrrcnl8fzxrbgnhr4v34f9-nix-grpc-store-0.2.2.drv
  /nix/store/kf5xvg0v46qz6hghy4r44fjay6015zyk-nix-grpc-store-dispatcher.drv