You're not running into issues with building the N64 emulator mupen64plus? It's only happening on Debian Stretch (x86-64) but it could be my setup so that's why I'm asking. It's requiring a newer version of cmake than what's available:
/home/pi/RetroPie-Setup/tmp/build/mupen64plus/GLideN64/projects/cmake /home/pi/RetroPie-Setup/tmp/build/mupen64plus /home/pi/RetroPie-Setup
CMake Error at CMakeLists.txt:1 (cmake_minimum_required):
CMake 3.9 or higher is required. You are running version 3.7.2
@NeoDude Not a mistake, but it seems something is missing. Do you have OpenGL acceleration working ?
Have you used Ubuntu's installer or did you manually install the driver ? I'd recommend using the Ubuntu's PPA packages to install the drivers or the Ubuntu package management app (Software center ?).