these 2 derivations will be built:
  /nix/store/0szy2z7c293d2f96kf106qi77whfc2rm-nix-grpc-store-0.2.3.drv
  /nix/store/acjnwvjxw6f0g1rc6wvvv2rznlal7418-nix-grpc-store-exit-stress.drv