diff --git a/scripts/postinstall-bundled-plugins.mjs b/scripts/postinstall-bundled-plugins.mjs
index be084e6d039..2edb66a13c5 100644
--- a/scripts/postinstall-bundled-plugins.mjs
+++ b/scripts/postinstall-bundled-plugins.mjs
@@ -705,10 +705,22 @@ export async function runPluginRegistryPostinstallMigration(params = {}) {
 
 export function isSourceCheckoutRoot(params) {
   const pathExists = params.existsSync ?? existsSync;
+  const readFile = params.readFileSync ?? readFileSync;
   const hasPostinstallInventory = pathExists(join(params.packageRoot, DIST_INVENTORY_PATH));
+  let hasDeclaredMirroredPackageRuntimeDeps = false;
+  try {
+    const packageJson = JSON.parse(readFile(join(params.packageRoot, "package.json"), "utf8"));
+    const mirrored = packageJson?.openclaw?.bundle?.mirroredRootRuntimeDependencies;
+    hasDeclaredMirroredPackageRuntimeDeps = Array.isArray(mirrored) && mirrored.length > 0;
+  } catch {
+    hasDeclaredMirroredPackageRuntimeDeps = false;
+  }
+  const hasPackagedRuntimeDepsLayout =
+    hasPostinstallInventory || hasDeclaredMirroredPackageRuntimeDeps;
   return (
     (pathExists(join(params.packageRoot, ".git")) ||
-      (pathExists(join(params.packageRoot, "pnpm-workspace.yaml")) && !hasPostinstallInventory)) &&
+      (pathExists(join(params.packageRoot, "pnpm-workspace.yaml")) &&
+        !hasPackagedRuntimeDepsLayout)) &&
     pathExists(join(params.packageRoot, "src")) &&
     pathExists(join(params.packageRoot, "extensions"))
   );
diff --git a/test/scripts/postinstall-bundled-plugins.test.ts b/test/scripts/postinstall-bundled-plugins.test.ts
index 7f374e3c6a1..8748a9ddfba 100644
--- a/test/scripts/postinstall-bundled-plugins.test.ts
+++ b/test/scripts/postinstall-bundled-plugins.test.ts
@@ -140,6 +140,7 @@ describe("bundled plugin postinstall", () => {
   it("does not classify published packages with source files as source checkouts", () => {
     const packageRoot = "/pkg";
     const existingPaths = new Set([
+      path.join(packageRoot, "package.json"),
       path.join(packageRoot, "pnpm-workspace.yaml"),
       path.join(packageRoot, "src"),
       path.join(packageRoot, "extensions"),
@@ -150,6 +151,14 @@ describe("bundled plugin postinstall", () => {
       isSourceCheckoutRoot({
         packageRoot,
         existsSync: (value: string) => existingPaths.has(value),
+        readFileSync: () =>
+          JSON.stringify({
+            openclaw: {
+              bundle: {
+                mirroredRootRuntimeDependencies: ["json5"],
+              },
+            },
+          }),
       }),
     ).toBe(false);
   });