title: npm build crashed on ssr
body: <p>I want to implement SSR in my Angular app to improve Google crawling.
  So I added the missing packages with the following command:
  <code>npm install --save @angular/platform-server @nguniversal/module-map-ngfactory-loader ts-loader @nguniversal/express-engine
  </code></p>
  
  <p>If I execute the build command <code>npm run build:ssr</code> the following error occurs: </p>
  
  <pre><code>ERROR in D:\Documents\webapp\server.ts
  ./server.ts
  [tsl] ERROR in D:\Documents\webapp\server.ts(24,20)
        TS2349: This expression is not callable.
    Type 'typeof e' has no call signatures.
  </code></pre>
  
  <p>This is the server.ts:</p>
  
  <pre><code>/**
   * *** NOTE ON IMPORTING FROM ANGULAR AND NGUNIVERSAL IN THIS FILE ***
   *
   * If your application uses third-party dependencies, you'll need to
   * either use Webpack or the Angular CLI's `bundleDependencies` feature
   * in order to adequately package them for use on the server without a
   * node_modules directory.
   *
   * However, due to the nature of the CLI's `bundleDependencies`, importing
   * Angular in this file will create a different instance of Angular than
   * the version in the compiled application code. This leads to unavoidable
   * conflicts. Therefore, please do not explicitly import from @angular or
   * @nguniversal in this file. You can export any needed resources
   * from your application's main.server.ts file, as seen below with the
   * import for `ngExpressEngine`.
   */
  
  import 'zone.js/dist/zone-node';
  
  import * as express from 'express';
  import {join} from 'path';
  
  // Express server
  export const app = express();
  
  
  
  
  const PORT = process.env.PORT || 4000;
  const DIST_FOLDER = join(process.cwd(), 'dist/browser');
  
  // * NOTE :: leave this as require() since this file is built Dynamically from webpack
  const {AppServerModuleNgFactory, LAZY_MODULE_MAP, ngExpressEngine, provideModuleMap} = require('./dist/server/main');
  
  // Our Universal express-engine (found @ https://github.com/angular/universal/tree/master/modules/express-engine)
  app.engine('html', ngExpressEngine({
    bootstrap: AppServerModuleNgFactory,
    providers: [
      provideModuleMap(LAZY_MODULE_MAP)
    ]
  }));
  
  app.set('view engine', 'html');
  app.set('views', DIST_FOLDER);
  
  // Example Express Rest API endpoints
  // app.get('/api/**', (req, res) =&gt; { });
  // Serve static files from /browser
  app.get('*.*', express.static(DIST_FOLDER, {
    maxAge: '1y'
  }));
  
  // All regular routes use the Universal engine
  app.get('*', (req, res) =&gt; {
    res.render('index', { req });
  });
  </code></pre>
  
  <p>If I use <code>npm run build</code> without ssr it works.</p>
  
  <p>Does anybody know the solution?</p>