问题 I used postcss, postcss-css-modules and posthtml-css-modules to implement CSS Modules in a Angular Application. I also used @angular-builders/custom-webpack to achieved this. Now, I want to do the same with my Custom Angular Library. However, I cannot use @angular-builders/custom-webpack because the Angular Libraries are build using ng-packagr. So, @angular-builders/custom-webpack is not available to use: https://github.com/just-jeb/angular-builders/issues/356 On the other hand, ng-packagr