I had the same problem too and solved it by writing build rules for WAF(http://www.l-vu.com/2012/03/21/Using_waf_to_build_web_assets/ http://www.l-vu.com/2012/0

I had the same problem too and solved it by writing build rules for WAF(http://www.l-vu.com/2012/03/21/Using_waf_to_build_web_assets/ http://www.l-vu.com/2012/03/21/Using_waf_to_build_web_assets...)