So many people took a look and nobody knew
Last install I did something with netpkg or similar...
But when I tried to install virt-manager, i got to no result! The package management (netpkg, slackpkg,flatpak... maybe even slackbuilds?) confused me and so I decided to continue directly with slackware 15, what I am a little familiar with...
A shame that is so hard to find docs and howtos for zenwalk linux or at least working links pointing to it!
I decided to install zenwalk in a VM now and continue my investigation into that update issue, cause zenwalk linux looks like made with love & effort!