# HookWebpackError: \_\_webpack\_modules\_\_ is not defined
**URL:** https://discourse.aurelia.io/t/hookwebpackerror-webpack-modules-is-not-defined/4463
**Category:** Help Requests
**Created:** [November 2, 2021, 4:50pm UTC](https://discourse.aurelia.io/t/hookwebpackerror-webpack-modules-is-not-defined/4463 "2021-11-02T16:50:19Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@vidriduch](https://discourse.aurelia.io/u/vidriduch)
#### Post date: [November 2, 2021, 4:50pm UTC](https://discourse.aurelia.io/t/hookwebpackerror-webpack-modules-is-not-defined/4463/1 "2021-11-02T16:50:19Z")
to reproduce:
1. New Aurelia V1 project via `au new appName` → options typescript,htmlmin,sass,vscode`
2. Add bootstrap and bootswatch via yarn install.
3. New file called zimports.ts in src root with contents
`import "bootswatch/dist/yeti/bootstrap.min.css";`
4. Then import this file in main.ts
`import './zimport';`
5. `au run --watch`
6. it builds but got an error:
Any ideas why is this happening? I used to be able to do this with no problems… Thank you!
```auto
javascript modules 636 bytes
./src/main.ts 547 bytes [built] [code generated]
./src/zimport.ts 50 bytes [built] [code generated]
./node_modules/bootswatch/dist/yeti/bootstrap.min.css 39 bytes [built] [code generated] [1 error]
ERROR in ./node_modules/bootswatch/dist/yeti/bootstrap.min.css
Module build failed (from ./node_modules/mini-css-extract-plugin/dist/loader.js):
HookWebpackError: __webpack_modules__ is not defined
at tryRunOrWebpackError (D:\Temp\e3web\node_modules\webpack\lib\HookWebpackError.js:88:9)
at __webpack_require_module__ (D:\Temp\e3web\node_modules\webpack\lib\Compilation.js:4963:12)
at D:\Temp\e3web\node_modules\webpack\lib\Compilation.js:4987:11
at symbolIterator (D:\Temp\e3web\node_modules\neo-async\async.js:3485:9)
at timesSync (D:\Temp\e3web\node_modules\neo-async\async.js:2297:7)
at Object.eachLimit (D:\Temp\e3web\node_modules\neo-async\async.js:3463:5)
at D:\Temp\e3web\node_modules\webpack\lib\Compilation.js:4863:16
at symbolIterator (D:\Temp\e3web\node_modules\neo-async\async.js:3485:9)
at done (D:\Temp\e3web\node_modules\neo-async\async.js:3527:9)
at D:\Temp\e3web\node_modules\webpack\lib\Compilation.js:4778:8
-- inner error --
ReferenceError: __webpack_modules__ is not defined
at webpack/runtime/Aurelia expose webpack internal:1:50
at D:\Temp\e3web\node_modules\webpack\lib\javascript\JavascriptModulesPlugin.js:460:11
at Hook.eval [as call] (eval at create (D:\Temp\e3web\node_modules\tapable\lib\HookCodeFactory.js:19:10), :9:1)
at Hook.CALL_DELEGATE [as _call] (D:\Temp\e3web\node_modules\tapable\lib\Hook.js:14:14)
at D:\Temp\e3web\node_modules\webpack\lib\Compilation.js:4965:39
at tryRunOrWebpackError (D:\Temp\e3web\node_modules\webpack\lib\HookWebpackError.js:83:7)
at __webpack_require_module__ (D:\Temp\e3web\node_modules\webpack\lib\Compilation.js:4963:12)
at D:\Temp\e3web\node_modules\webpack\lib\Compilation.js:4987:11
at symbolIterator (D:\Temp\e3web\node_modules\neo-async\async.js:3485:9)
at timesSync (D:\Temp\e3web\node_modules\neo-async\async.js:2297:7)
Generated code for webpack/runtime/Aurelia expose webpack internal
1 | __webpack_require__.m = __webpack_require__.m || __webpack_modules__ ;
2 | __webpack_require__.c = __webpack_require__.c || __webpack_module_cache__ ;
@ ./src/zimport.ts 1:0-48
@ ./src/main.ts 3:0-19
@ ./node_modules/aurelia-webpack-plugin/runtime/empty-entry.js
webpack 5.61.0 compiled with 1 error in 944 ms
```
---
### Author:  [@MaximBalaganskiy](https://discourse.aurelia.io/u/MaximBalaganskiy)
#### Post date: [November 3, 2021, 6:19am UTC](https://discourse.aurelia.io/t/hookwebpackerror-webpack-modules-is-not-defined/4463/2 "2021-11-03T06:19:19Z")
try
```auto
new MiniCssExtractPlugin({
experimentalUseImportModule: false
}),
```
---
### Author:  [@vidriduch](https://discourse.aurelia.io/u/vidriduch)
#### Post date: [November 3, 2021, 9:19am UTC](https://discourse.aurelia.io/t/hookwebpackerror-webpack-modules-is-not-defined/4463/3 "2021-11-03T09:19:27Z")
Thank you. It worked with css, but importing scss still showing some errors. I have created a new issue for this here [HookWebpackError: \_\_webpack\_modules\_\_ is not defined when importing css/scss in typescript file · Issue #197 · aurelia/webpack-plugin · GitHub](https://github.com/aurelia/webpack-plugin/issues/197)
---
### Author:  [@ghiscoding](https://discourse.aurelia.io/u/ghiscoding)
#### Post date: [November 5, 2021, 3:05pm UTC](https://discourse.aurelia.io/t/hookwebpackerror-webpack-modules-is-not-defined/4463/4 "2021-11-05T15:05:03Z")
That got fixed by @bigopon with an update on `aurelia-webpack-plugin` to `5.0.3`, check the new [release](https://github.com/aurelia/webpack-plugin/releases/tag/v5.0.3) for it.