title: Webpack "cannot find module" source-map, module build failed
body: <p>I'm trying to bundle project with Webpack, but I recieve an error: "Cannot find module './stylesheet/css/build.css'"
  I'm using webpack 1.14.0 and yarn 0.17.10. 
  <a href="https://i.stack.imgur.com/KZSyC.png" rel="nofollow noreferrer">webpack printscreen</a></p>
  
  <p>Please give me some advise how I should use require() to get result.</p>
  
  <p>Thanks in advise for your help!</p>
  
  <h2>webpack.dev.js</h2>
  
  <pre><code>  var config = {
        cache: true,
        devtool: 'source-map',
        entry: {
          polyfills: './src/polyfills',
          vendor:    './src/vendor',
          main:      './src/main'
        },
  
        output: {
          path: path.join(__dirname, 'dist'),
          filename: '[name].bundle.js',
          sourceMapFilename: '[name].map',
          chunkFilename: '[id].chunk.js'
        },
  
        module: {
          loaders: [
            { test: /\.ts$/,   loader: 'awesome-typescript-loader' },
            { test: /\.json$/, loader: 'json-loader' },
            { test: /\.html/,  loader: 'raw-loader' },
            { test: /\.css$/,  loader: 'to-string-loader!css-loader' },
            { test: /\.css$/,  loader: ExtractTextPlugin.extract('css?minimize')}
          ]
        },
        plugins: [
            new webpack.optimize.CommonsChunkPlugin({ name: ['polyfills', 'vendor', 'main'].reverse(), minChunks: Infinity }),
            new ExtractTextPlugin('/src/stylesheet/css/zio.css')
        ],
  
        resolve: {
          extensions: ['', '.ts', '.js', '.json'],
          modulesDirectories: ['node_modules', 'src']
        }
      };
  </code></pre>
  
  <h2>main.ts</h2>
  
  <pre><code>require("./stylesheet/css/build.css");
  
  @NgModule({
    declarations: [
      App,
      Main,
      Auth,
      AppHeader
    ],
    providers,
    imports: [
      BrowserModule,
      HttpModule,
      FormsModule,
      routes
    ],
    bootstrap: [App]
  })
  export class AppModule {}
  </code></pre>
  
  <p>Additional information -  <a href="https://i.stack.imgur.com/zRPRw.png" rel="nofollow noreferrer">structure of project</a></p>