these 2 derivations will be built:
  /nix/store/4ww0v7s5lm6qc53vmgb992p2nj8asq6h-nix-grpc-store-0.1.0.drv
  /nix/store/y8v01dj62v5yi4bamln9jmh0nq5k14v0-nix-grpc-store-exit-stress.drv