Relative paths - helpers.root('node_modules')

[gbmeow]

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Error Unexpected value 'FileUploadModule' imported by the module 'UploaderModule'

valor-software/ng2-file-upload#426

Is there a reason - why - we need relative paths for external Typescript modules?
Is it a systemjs that cannot load - a typescript only NODE_MODULE

C:\workspace\angular2-webpack-starter\config\webpack.common.js
Does not work - modules: [helpers.root('src'), 'node_modules' ],
Works - modules: [helpers.root('src'), helpers.root('node_modules' )],

How to replicate?

1. npm install - https://github.com/AngularClass/angular2-webpack-starter
2. npm install https://github.com/georgebatalinski/PUBLIC_NODE_MODULE
3. C:\workspace\angular2-webpack-starter\src\app\app.module.ts

import { FunBoardModule } from 'public_node_module';
...
imports: [ // import Angular's modules
    ...,
    FunBoardModule,
  ],

4. npm start
   Expected: get error

####TO fix
C:\workspace\angular2-webpack-starter\config\webpack.common.js
change - modules: [helpers.root('src'), 'node_modules' ],
to [helpers.root('src'), helpers.root('node_modules' )],

[karolmie1]

different problem, same solution: #1114