anchor.diff:  
   [source,javascript]
   ----
  -import { PolymerElement } from '../node_modules/@vaadin/angular2-polymer/polymer-element';
  +import { PolymerElement } from '@vaadin/angular2-polymer';
   ----
   
   Your Angular 2 component also needs to declare the usage of the directive.
  
positive.code: ----
  
  Also the SystemJS configuration needs some modifications in order to load the modules correctly.
  Add the following `packages` entry for `bower_components` to your configuration unless it is already present.
  
  [source,javascript]
  ----
  System.config({
    map: {
      'bower_components': 'bower_components'
    },
    packages: {
      'bower_components': {
        defaultExtension: 'js'
      }
    }
  });
  
negative.code: 
  [source, javascript]
  ----
  import { PolymerElement } from '@vaadin/angular2-polymer';
  
  @Component({
    selector: 'my-component',
  