First make sure you have the "extra" section of the repos enabled
Try this as root in a terminal
slapt-get --update && slapt-get --searcn cruxports4slack
if it finds the package then do
slapt-get --install cruxports4slack
let me know how that goes, we'll come up with the rest of the plan...
Just dont give up ... I need you to install mysql because I'm trying to lean mysql myself... maybe we can help each other out