diff --git a/external/subpack/net/nginx-util/src/uci-cxx.cpp b/external/subpack/net/nginx-util/src/uci-cxx.cpp
new file mode 100644
index 0000000..c880548
--- /dev/null
+++ b/external/subpack/net/nginx-util/src/uci-cxx.cpp
@@ -0,0 +1,22 @@
+#include <iostream>
+#include <mutex>
+#include <string>
+#include <string_view>
+#include <vector>
+
+#include "uci-cxx.hpp"
+
+auto main() -> int
+{
+    uci::element p = uci::package{"nginx"};
+    std::cout << "package " << p.name() << "\n\n";
+    for (auto s : p) {
+        std::cout << "config " << s.type() << " '" << s.name() << "'\n";
+        for (auto o : s) {
+            for (auto i : o) {
+                std::cout << "\t" << o.type() << " " << o.name() << " '" << i.name() << "'\n";
+            }
+        }
+        std::cout << "\n";
+    }
+}