const webpack = require('webpack') const fs = require('fs') const packageJson = fs.readFileSync('./package.json') const version = JSON.parse(packageJson).version || 0 module.exports = { publicPath: '/geocontrib/', configureWebpack: { plugins: [ new webpack.DefinePlugin({ 'process.env': { PACKAGE_VERSION: '"' + version + '"' } }) ] }, // the rest of your original module.exports code goes here }