these 2 derivations will be built:
  /nix/store/1q3zmzlp7c1634xlmifq50j518qdbl75-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/n180zd677vjn17nrkgi8hjkp0cxy3lrq-nix-grpc-store-exit-stress.drv