these 2 derivations will be built:
  /nix/store/4gzf9hbixx7gqa7jv2fkmhww5dac455w-nix-grpc-store-0.2.1.drv
  /nix/store/6vzm9525jgl000d6jzrxqnif4av88w1b-nix-grpc-store-exit-stress.drv