Yast Development environment

Greets: I know I have asked this before but on a clean install of 9.1 (9.2 not available yet) there seem to be issues with installing the Yast development environment. Specifically it does not seem to remain current with updates for yast. Since at least 6 rpm's need to be downgraded, was wondering what the recommended proceedure is for install the Yast dev environment /ch