diff --git a/examples/lua_plugin/CMakeLists.txt b/examples/lua_plugin/CMakeLists.txt
index 4d6708b..09c45f4 100644
--- a/examples/lua_plugin/CMakeLists.txt
+++ b/examples/lua_plugin/CMakeLists.txt
@@ -5,4 +5,6 @@ add_custom_command(
   TARGET lua_plugin_manager
   POST_BUILD
   COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/plugin.lua
-          $<TARGET_FILE_DIR:lua_plugin_manager>)
+          $<TARGET_FILE_DIR:lua_plugin_manager>/plugin_1.lua
+  COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/plugin.lua
+          $<TARGET_FILE_DIR:lua_plugin_manager>/plugin_2.lua)
diff --git a/examples/lua_plugin/lua_plugin_manager.cpp b/examples/lua_plugin/lua_plugin_manager.cpp
index 8cc8f9d..88a95b0 100644
--- a/examples/lua_plugin/lua_plugin_manager.cpp
+++ b/examples/lua_plugin/lua_plugin_manager.cpp
@@ -36,9 +36,11 @@ int main(int argc, char* argv[])
             // only load files ending with ".lua" and execute in separate thread
             if (path.extension() == ".lua") {
                 if (auto plugin = manager.loadLuaPlugin(path)) {
-                    threads.emplace_back([plugin = std::move(*plugin)]() mutable {
+                    threads.emplace_back([plugin = std::move(*plugin), plugin_number = threads.size()]() mutable {
+                        // data race due to shared resource "stdout",
+                        // but Lua plugins are otherwise thread-safe
                         std::ignore = plugin.call<void>("initialize");
-                        std::ignore = plugin.call<void>("loop", "2");
+                        std::ignore = plugin.call<void>("loop", plugin_number);
                     });
                 }
             }