hmmm nope now it says liblua5.1-0 (>= 5.1.4-3) on "problems" and won't install. i'm gonna disable extras devl and testing and see if MohammadAG is right. This is one reason I hate computers: at some point, for any complex problem, you just end up trying random **** until it works.

-edit-
nope, he's right, still doesn't work... looking through app manager bug reports now.