Angular 2 building single modules -

i know how build out project angular cli: ng build --prod

how can compile each module separately? project:

anagaccreditamento , cruscottofiliera separate modules, module.ts, routing.module.ts file. how can build them separately , insert them project @ later time if libraries?

if want able pull in modules needed, want lazy loading. can find out how use lazy loading here: https://angular.io/docs/ts/latest/guide/router.html#!#asynchronous-routing

or there pluralsight course here: https://app.pluralsight.com/library/courses/angular-routing/table-of-contents