@ngtools/webpack: missing app.module.ngfactory

I am trying to use the @ngtools/webpack plugin to create an AoT version of my Angular 4 app within webpack 2, but I am having difficulty understanding what this plugin produces.

In particular, I have a main.aot.ts entry point in my webpack for AoT, which looks like this:

// main.aot.ts
import { platformBrowser } from '@angular/platform-browser';
import { AppModuleNgFactory } from '../compiled/src/app/app.module.ngfactory';
const platform = platformBrowser();

platform.bootstrapModuleFactory(AppModuleNgFactory);

and an extract of my webpack.config.js looks like this:

if (envOptions.MODE === 'prod') {
    config.module.rules.push(
        {test: /\.ts$/, loader: '@ngtools/webpack'}
    );
    config.plugins.push(
        new AotPlugin({
            tsConfigPath: path.resolve(__dirname, './app/tsconfig.json'),
            entryModule: path.resolve(__dirname, './app/src/app.module#AppModule')
        }),
        new webpack.optimize.UglifyJsPlugin({
            beautify: false,
            mangle: {
                screw_ie8: true,
                keep_fnames: true
            },
            compress: {
                warnings: false,
                screw_ie8: true
            },
            comments: false
        })
    );
}

Does this @ngtools/webpack plugin generate module files in the same way that the ngc compiler does, for inclusion in main.aot.ts? If not, how does it work? There aren't many examples of this on the web.

via serlingpa