I don’t understand how to download the nightly build. I go to the nightly folder, then apple, then ios, and there are a bunch of folders. I download the ios folder and upzip it and I just get folders.
what you have to do is… Download retroarch Github files, install retroarch from cydia then overwritte it with github files on ios 8.4.1. Dont update to iOS 9 if you want to use it.