diff --git a/src/modules/qqbot/plugin-platform/infrastructure/integration/package/builtin-plugin-package-loader.service.ts b/src/modules/qqbot/plugin-platform/infrastructure/integration/package/builtin-plugin-package-loader.service.ts
index e4c24a0..ce678c1 100644
--- a/src/modules/qqbot/plugin-platform/infrastructure/integration/package/builtin-plugin-package-loader.service.ts
+++ b/src/modules/qqbot/plugin-platform/infrastructure/integration/package/builtin-plugin-package-loader.service.ts
@@ -177,7 +177,7 @@ export class QqbotBuiltinPluginPackageLoaderService {
       `src/modules/qqbot/plugins/${pluginKey}`,
     );
     if (existsSync(join(sourceRoot, 'plugin.json'))) return sourceRoot;
-    return join(__dirname, `../../../plugins/${pluginKey}`);
+    return join(__dirname, `../../../../plugins/${pluginKey}`);
   }
 }
 
diff --git a/test/modules/qqbot/plugin-platform/builtin-plugin-package-loader.spec.ts b/test/modules/qqbot/plugin-platform/builtin-plugin-package-loader.spec.ts
new file mode 100644
index 0000000..d5b42e6
--- /dev/null
+++ b/test/modules/qqbot/plugin-platform/builtin-plugin-package-loader.spec.ts
@@ -0,0 +1,34 @@
+import { mkdtempSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import { QqbotBuiltinPluginPackageLoaderService } from '@/modules/qqbot/plugin-platform/infrastructure/integration/package/builtin-plugin-package-loader.service';
+
+describe('QqbotBuiltinPluginPackageLoaderService', () => {
+  const createLoader = () =>
+    new QqbotBuiltinPluginPackageLoaderService(
+      {} as any,
+      {} as any,
+      {} as any,
+      {} as any,
+      {} as any,
+      {} as any,
+    ) as any;
+
+  it('resolves built-in plugin manifests from compiled qqbot plugin package root', () => {
+    const originalCwd = process.cwd();
+    const sandbox = mkdtempSync(join(tmpdir(), 'kt-plugin-loader-'));
+
+    try {
+      process.chdir(sandbox);
+
+      const pluginRoot = createLoader().resolvePluginRoot('bangdream') as string;
+      const normalized = pluginRoot.replace(/\\/g, '/');
+
+      expect(normalized).toMatch(/modules\/qqbot\/plugins\/bangdream$/);
+      expect(normalized).not.toContain('/plugin-platform/plugins/');
+    } finally {
+      process.chdir(originalCwd);
+      rmSync(sandbox, { recursive: true, force: true });
+    }
+  });
+});