This post shows you how to solve “Unknown option: ‘–environment’” error when you are trying to build your Angular application with Angular CLI using the command like this:
ng build --environment=prod
You get the “Unknown option: ‘–environment'” error because you have installed
angular/cli v6+ while the above command works in
angular/cli 1.x only.
The solution is to use the new command as shown right below:
ng build --configuration=production