these 2 derivations will be built:
  /nix/store/3l2xsmcp60dyiawbyazk4rfrb7hk0463-nix-grpc-store-0.2.0.drv
  /nix/store/7ac88cy0d6zlhj1n8p5zkalx3lrhbscf-nix-grpc-store-exit-stress.drv