diff --git a/scripts/build-backend.ts b/scripts/build-backend.ts
index de36403..c1524bc 100644
--- a/scripts/build-backend.ts
+++ b/scripts/build-backend.ts
@@ -105,7 +105,7 @@ function runTsdown() {
 /** 使用 LLRT compile 生成 .lrt 文件 */
 function runLlrtCompile() {
   console.log("\n--- Running LLRT compile ---");
-  execSync(`${LLRT_BIN} compile ./dist_backend/backend/app.cjs ./dist_backend/app.lrt`, {
+  execSync(`${LLRT_BIN} compile ./dist_backend/app.cjs ./dist_backend/app.lrt`, {
     stdio: "inherit",
     cwd: ROOT_DIR,
   });
diff --git a/tsdown.config.ts b/tsdown.config.ts
index 7712a91..66eea0a 100644
--- a/tsdown.config.ts
+++ b/tsdown.config.ts
@@ -1,13 +1,29 @@
 import { defineConfig } from "tsdown";
 
-export default defineConfig({
-  entry: ["backend/app.ts", "基准测试_llrt.ts"],
+const shared = {
   format: ["cjs"],
   clean: true,
   sourcemap: true,
   outDir: "dist_backend",
+  outputOptions: {
+    /** 禁用代码拆分，确保单文件输出（tsdown 默认会拆分大依赖为 chunk） */
+    codeSplitting: false,
+  },
   deps: {
     /** 所有依赖都打进 bundle（LLRT scratch 镜像无 node_modules） */
     alwaysBundle: [/.*/],
   },
-});
+};
+
+export default [
+  defineConfig({
+    ...shared,
+    entry: ["backend/app.ts"],
+  }),
+  defineConfig({
+    ...shared,
+    /** 第二个配置不 clean，避免清掉第一个的输出 */
+    clean: false,
+    entry: ["基准测试_llrt.ts"],
+  }),
+];