Build folder missing in Ionic 2 project

Build folder is missing in ionic 2 project folder.

Whenever i am trying to download any existing ionic 2 template in that one also build folder missing,

It should be generated, I had the same issue when I updated to latest ionic@beta my old project no longer generated the build files.

So it might be a conflict between source and your ionic@beta version?
If you’re checking out an up-to-date template, try updating your ionic to latest version.

But I’m no true Wizard.

Build folder automatically creating inside www folder when we build the project after adding the platform or building with cordova.

After executing below lines it’s creating automatically

ionic platform add android
ionic build android