old_contents: var path = require('path');
  var webpack = require('webpack');
  
  module.exports = {
    cache: true,
    entry: path.join(__dirname, '/modules/index.js'),
    externals: {
      'react': 'React'
    },
    output: {
      path: path.join(__dirname, '/dist'),
      filename: 'radium.js',
      library: "Radium",
      libraryTarget: "umd"
    },
    module: {
      loaders: [
        {
          test: /\.js(x|)?$/,
          loader: 'babel-loader?stage=0'
        }
      ]
    }
  }
  
new_contents: var path = require('path');
  var webpack = require('webpack');
  
  module.exports = {
    cache: true,
    entry: path.join(__dirname, '/modules/index.js'),
    externals: [
      {
        "react": {
          root: "React",
          commonjs2: "react",
          commonjs: "react",
          amd: "react"
        }
      }
    ],
    output: {
      path: path.join(__dirname, '/dist'),
      filename: 'radium.js',
      library: 'Radium',
      libraryTarget: 'umd'
    },
    module: {
      loaders: [
        {
          test: /\.js(x|)?$/,
          loader: 'babel-loader?stage=0'
        }
      ]
    }
  }
  
subject: Fix externals in webpack config