diff --git a/src/Libraries/robot_cpp/src/plugin_loader_helper.cpp b/src/Libraries/robot_cpp/src/plugin_loader_helper.cpp
index bcdbdc9..a109fab 100644
--- a/src/Libraries/robot_cpp/src/plugin_loader_helper.cpp
+++ b/src/Libraries/robot_cpp/src/plugin_loader_helper.cpp
@@ -338,7 +338,7 @@ std::string PluginLoaderHelper::getBuildDirectory()
 std::string PluginLoaderHelper::getWorkspacePath()
 {
   // Method 1: Từ environment variable PNKX_NAV_CORE_DIR
-  const char* workspace_path = std::getenv("PNKX_NAV_CORE_DIR");
+  const char* workspace_path = std::getenv("PNKX_NAV_CORE_LIBRARY_PATH");
   if (workspace_path && std::filesystem::exists(workspace_path)) {
     return std::string(workspace_path);
   }