diff --git a/next.config.mjs b/next.config.mjs
index e13d80c0d..3fd18c7c3 100644
--- a/next.config.mjs
+++ b/next.config.mjs
@@ -6,8 +6,6 @@ console.log("[Next] build mode", mode);
 const disableChunk = !!process.env.DISABLE_CHUNK || mode === "export";
 console.log("[Next] build with chunk: ", !disableChunk);
 
-process.env.LANGCHAIN_CALLBACKS_BACKGROUND = true;
-
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   webpack(config) {
@@ -22,6 +20,12 @@ const nextConfig = {
       );
     }
 
+    config.plugins.push(
+      new webpack.DefinePlugin({
+        'process.env.LANGCHAIN_CALLBACKS_BACKGROUND': JSON.stringify('true'),
+      })
+    );
+
     config.resolve.fallback = {
       child_process: false,
     };
@@ -104,4 +108,4 @@ if (mode !== "export") {
   };
 }
 
-export default nextConfig;
+export default nextConfig;
\ No newline at end of file