title: Webpack + Babel: Couldn't find preset "es2015" relative to directory
body: <p>I have a React project using Webpack and Babel. When I created it on an office computer, the Webpack ran fine. When I cloned the project onto my personal computer, it gave the following error:</p>
  
  <pre><code>ERROR in ./react_minesweeper.jsx
  Module build failed: Error: Couldn't find preset "es2015" relative to directory "/Users/louisstephancruz/Desktop"
  at /Users/louisstephancruz/Desktop/w6d5/minesweeper/node_modules/babel-core/lib/transformation/file/options/option-manager.js:298:19
  at Array.map (native)
  at OptionManager.resolvePresets (/Users/louisstephancruz/Desktop/w6d5/minesweeper/node_modules/babel-core/lib/transformation/file/options/option-manager.js:269:20)
  </code></pre>
  
  <p>Here's my <code>webpack.config.js</code>:</p>
  
  <pre><code>module.exports = {
    entry: './react_minesweeper.jsx',
    output: {
      path: './',
      filename: 'bundle.js',
    },
    module: {
      loaders: [
        {
          test: [/\.jsx?$/, /\.js?$/],
          exclude: /(node_modules)/,
          loader: 'babel',
          query: {
            presets: ['es2015', 'react']
          }
        }
      ]
    },
    devtool: 'source-map',
    resolve: {
      extensions: ['', '.js', '.jsx' ]
    }
  };
  </code></pre>
  
  <p>Here's my <code>package.json</code>:</p>
  
  <pre><code>{
    "name": "minesweeper",
    "version": "1.0.0",
    "description": "",
    "main": "webpack.config.js",
    "scripts": {
      "test": "echo \"Error: no test specified\" &amp;&amp; exit 1",
      "start": "webpack-dev-server --inline"
    },
    "keywords": [],
    "author": "",
    "license": "ISC",
    "devDependencies": {
      "babel": "^6.5.2",
      "babel-core": "^6.17.0",
      "babel-loader": "^6.2.5",
      "babel-preset-es2015": "^6.16.0",
      "babel-preset-react": "^6.16.0",
      "webpack": "^1.13.2",
      "webpack-dev-server": "^1.16.2"
    },
    "dependencies": {
      "react": "^15.3.2",
      "react-dom": "^15.3.2"
    }
  }
  </code></pre>
  
  <p>My version of node is: v5.6.0
  My version of npm is: 3.6.0</p>