Does this uglify process still work with v1 projects and v2 ionic beta?

Hey folks, I set up this method to uglify/minify my code.
http://blog.ionic.io/minifying-your-source-code/

Does anyone know if this still works ? I am on a v1 project but using ionic beta (latest).

My release builds compiles - but installing it causes a complete UI mess. Debug builds work.
I figured out disabling uglify resolves this issue.

Any thoughts?