insomnia/packages/insomnia-app/.storybook/webpack.config.js

/** @type { import('webpack').Configuration } */
module.exports = ({ config }) => {
  config.module.rules.push({
    test: /\.less$/,
    use: [
      'style-loader',
      { loader: 'css-loader', options: { importLoaders: 1 } },
      { loader: 'less-loader', options: { noIeCompat: true } },
    ],
  });

  return config;
};