Why do you want/need the old one? The current one works fine with QHY5 now too (We have a QHY5 here too and migrated to the new driver some weeks ago).
I recently installed indi-full from the ppa which include indi-qhy but nothing append. Same thing with my raspberry.
My Qhy5 was working with the old qhy5 code. This is why I was looking for it. In my mind and because of the history with QHYCCD, I thought the development was abandoned.
So it's a good news for me. I think a bug is responsable of my problem. Let's investigate
Linux Mint 19 Cinnamon using PPA for latest KStars-bleeding and INDI
Raspberry Pi 3 B+ with StellarMate
Atik 314E - ASI120M - CG5 with Celestron C9.25
Raspberry packages are updated from time to time but the PPA is daily. The old code is removed from the repo since the new driver is the one officially supported.