title: Webpack / Babel / React build error: "Unknown option: foo/node_modules/react/react.js.Children"
body: <p>I'm trying to build a project with webpack and react with this webpack config:</p>
  
  <pre><code>var path = require('path');
  var webpack = require('webpack');
  
  module.exports = {
    entry: [
      'babel-polyfill',
      './app/less/main.less',
      './app/main.js',
      'webpack-dev-server/client?http://localhost:8080'
    ],
    output: {
      publicPath: '/',
      filename: 'dist/main.js'
    },
    debug: true,
    devtool: 'source-map',
    module: {
      loaders: [
        {
          test: /\.js$/,
          include: path.join(__dirname, 'app'),
  
          loader: 'babel-loader',
          query: {
            presets: ['react', 'es2015']
          }
        },
        {
          test: /\.less$/,
          loader: "style!css!autoprefixer!less"
        },
      ]
    }
  };
  </code></pre>
  
  <p>I am sure I have the needed pm modules too and have webpack installed, however when running webpack I get:</p>
  
  <pre><code>Module build failed: ReferenceError: [BABEL] /Users/me/foo/app/main.js: Unknown option: foo/node_modules/react/react.js.Children
  </code></pre>
  
  <p>Any ideas?</p>