these 2 derivations will be built:
  /nix/store/607plc6icz2s3zpscaqkz6flx9hm90xg-nix-grpc-store-0.2.2.drv
  /nix/store/7872spvqpddicxpskkyvclvc9lv98q93-nix-grpc-store-exit-stress.drv