diff --git a/src/plugins/electron.ts b/src/plugins/electron.ts
index 57b415b..b6dda4b 100644
--- a/src/plugins/electron.ts
+++ b/src/plugins/electron.ts
@@ -254,7 +254,9 @@ export function electronPreloadConfigPresetPlugin(options?: ElectronPluginOption
             })
           } else {
             config.build.rolldownOptions!.output!['entryFileNames'] = '[name].mjs'
-            config.build.rolldownOptions!.output!['chunkFileNames'] = '[name]-[hash].mjs'
+            config.build.rolldownOptions!.output!['chunkFileNames'] = config.build.lib
+              ? '[name]-[hash].mjs'
+              : path.posix.join(build.assetsDir || defaultConfig.build.assetsDir, '[name]-[hash].mjs')
           }
         }
       }