Ah Thank you!! That is a great answer to my question. I appreciate it.
I am not up for it and I did manage to get my version working just fine on my laptop.
I always wondered why the Ubuntu version never supported Daphne and while I am sure there is a valid reason that it doesn't it would be nice if it did. There seems to be a lot of packages in the distro that it does not support.
Thank you again for the clear good answer.
The packager of the older 'daphne' plugin, only supported the ARM platform it appears. They didn't, or couldn't, get the package working for i386 or x64 which is why the older package only works for Raspberry Pi and won't install on Ubuntu - I am guessing.
Hypsesus uses CMake, and so is easier to port cross platform.
I take care of the application, but I haven't built a RetroPie port/package - so am hoping someone who has done this before will take it on-board.....