title: Module build failed: Error: Plugin 0 specified in "base" provided an invalid property of "definitions"
body: <p>I am unsuccessfully trying to get webpack to package a production build of my react/redux app. The build succeeds normally, but as soon as I add a webpack plugin to switch the environment as detailed here: <a href="https://stackoverflow.com/a/30061249/7114096">https://stackoverflow.com/a/30061249/7114096</a> (this is linked in the warning logged by redux as I am running a minified dev version) , it falls down.</p>
  
  <p>webpack.config.js:</p>
  
  <pre><code>'use strict';
  
  var webpack = require('webpack');
  var path = require('path');
  
  var BUILD_DIR = path.resolve(__dirname, 'web/bundles/frontend/build/react');
  var APP_DIR = path.resolve(__dirname, 'web/bundles/frontend/src/react');
  
  var config = {
      entry: ['babel-polyfill', APP_DIR + '/search.js'],
      output: {
          path: BUILD_DIR,
          filename: 'search.js'
      },
      module : {
          loaders : [
              {
                  test : /\.js?/,
                  include : APP_DIR,
                  loader : 'babel',
                  query: {
                      presets: ['react','es2015'],
                      plugins: [
                          new webpack.DefinePlugin({
                               'process.env': {
                                  'NODE_ENV': JSON.stringify('development')
                               }
                           }),
                          "transform-object-rest-spread"
                      ]
                  }
              }
          ]
      }
  };
  
  module.exports = config;
  </code></pre>
  
  <p>package.json:</p>
  
  <pre><code>"babel-cli": "^6.16.0",
  "babel-core": "^6.18.2",
  "babel-loader": "^6.2.5",
  "babel-plugin-transform-object-rest-spread": "^6.16.0",
  "babel-polyfill": "^6.16.0",
  "babel-preset-es2015": "^6.16.0",
  "babel-preset-node5": "^11.1.0",
  "babel-preset-react": "^6.16.0",
  "bower": "^1.7.9",
  "bower-update-all": "^0.1.2",
  "csswring": "^5.1.0",
  "gulp": "^3.9.1",
  "gulp-autoprefixer": "^3.1.0",
  "gulp-babel": "^6.1.2",
  "gulp-browserify": "^0.5.1",
  "gulp-clean-css": "^2.0.11",
  "gulp-compass": "^2.1.0",
  "gulp-concat": "^2.6.0",
  "gulp-imagemin": "^3.0.2",
  "gulp-minify": "0.0.12",
  "gulp-plumber": "^1.1.0",
  "gulp-postcss": "^6.1.1",
  "gulp-rename": "^1.2.2",
  "gulp-sourcemaps": "^1.6.0",
  "gulp-util": "^3.0.7",
  "gulp-webpack": "^1.5.0",
  "merge-stream": "^1.0.0",
  "path": "^0.12.7",
  "postcss-cssnext": "^2.7.0",
  "react": "^15.3.2",
  "react-bootstrap": "^0.30.5",
  "react-dom": "^15.3.2",
  "react-redux": "^4.4.5",
  "redux": "^3.6.0",
  "redux-saga": "^0.12.0",
  "require-dir": "^0.3.0",
  "webpack": "^1.13.3"
  </code></pre>
  
  <p>And finally the error:</p>
  
  <pre><code>ERROR in ./web/bundles/frontend/src/react/search.js
  Module build failed: Error: Plugin 0 specified in "base" provided an invalid property of "definitions"
      at Plugin.init (C:\xampp\htdocs\test\node_modules\babel-core\lib\transformation\plugin.js:131:13)
      at Function.normalisePlugin (C:\xampp\htdocs\test\node_modules\babel-core\lib\transformation\file\options\option-manager.js:148:12)
      at C:\xampp\htdocs\test\node_modules\babel-core\lib\transformation\file\options\option-manager.js:180:30
      at Array.map (native)
      at Function.normalisePlugins (C:\xampp\htdocs\test\node_modules\babel-core\lib\transformation\file\options\option-manager.js:154:20)
      at OptionManager.mergeOptions (C:\xampp\htdocs\test\node_modules\babel-core\lib\transformation\file\options\option-manager.js:229:36)
      at OptionManager.init (C:\xampp\htdocs\test\node_modules\babel-core\lib\transformation\file\options\option-manager.js:374:12)
      at File.initOptions (C:\xampp\htdocs\test\node_modules\babel-core\lib\transformation\file\index.js:216:65)
      at new File (C:\xampp\htdocs\test\node_modules\babel-core\lib\transformation\file\index.js:139:24)
      at Pipeline.transform (C:\xampp\htdocs\test\node_modules\babel-core\lib\transformation\pipeline.js:46:16)
      at transpile (C:\xampp\htdocs\test\node_modules\babel-loader\index.js:38:20)
      at Object.module.exports (C:\xampp\htdocs\test\node_modules\babel-loader\index.js:131:12)
   @ multi main
  </code></pre>
  
  <p>Any thoughts?</p>