Yeah... that was unfortunate.
When I created the new KDE build framework for 4.7 I initially blacklisted kross-interpreters because it was giving me Ruby related errors. I meant to fix that, and I forgot.
Pat adopted my KDE build system and never questioned the blacklisted packages...
I have now fixed this for my KDE 4.9.2 packages for Slackware 14 (see http://alien.slackbook.org/ktown/
). I also informed Pat how to update the Slackware source tree so that he can build a kross-interpreters package for KDE 4.8.5 as well.