This UMplayer app seems to be going to it's grave as far as development goes. When you start the app, you are prompted about this and recomended to go with the newer SMplayer. So far I have not found SMplayer in the 7.1 repo.
I've added the vlcore to gslapt and I can toggle it on/off as needed. If packages makes it there when I am checking for things, I can test.