Can't get SASS to work. about ng-universal-demo HOT 1 CLOSED

const { root }      = require('./helpers');
const nodeExternals = require('webpack-node-externals');

/**
 * This is a common webpack config which is the base for all builds
 */
module.exports = {
  devtool : 'source-map',
  target  : 'node', // in order to ignore built-in modules like path, fs, etc.
  resolve : {
    extensions : ['.ts', '.js']
  },
  output  : {
    path : root('dist')
  },
  module  : {
    rules : [
      { test : /\.ts$/, loader : '@ngtools/webpack' },
      { test : /\.css$/, loader : 'raw-loader' },
      { test : /\.html$/, loader : 'raw-loader' },
      { test: /\.scss$/, loaders: ['raw-loader', 'sass-loader?sourceMap'] },
    ]
  },
  plugins : []
};