dat.gui/webpack/webpack.config.min.js

var extend = require('extend'),
    webpack = require('webpack'),
    webpackConfig = require('./webpack.config');

var config = {
    plugins: [
        new webpack.optimize.UglifyJsPlugin({minimize: true})
    ],

    output: {
        filename: 'dat.gui.min.js'
    }
}

module.exports = extend(true, webpackConfig, config);