Since updating angular to v6.0.0 ng build with any other options creates angular.io.example. ng serve is working fine with or without --prod option.
I have no idea why it is not working.
My system versions are :
Package Version
@angular-devkit/architect 0.5.13
@angular-devkit/build-angular 0.5.13
@angular-devkit/build-optimizer 0.5.13
@angular-devkit/core 0.5.13
@angular-devkit/schematics 0.6.0 (cli-only)
@angular/cli
@angular/platform-server
@angular/upgrade
@ngtools/webpack 6.0.0-rc.11
@schematics/angular 0.6.0 (cli-only)
@schematics/update 0.6.0 (cli-only)
rxjs 6.1.0
typescript 2.7.2
webpack 4.6.0