To build system image, download repo: https://github.com/pelya/debian-noroot install dependencies described in it's readme, then launch commands: cd debian-noroot/img ./img-gimp-jessie-armhf.sh ./img-gimp-jessie-x86.sh ./img-gimp-jessie--prepare-obb.sh This will create Debian system image dist-gimp-jessie.tar.xz Upload resulting system image somewhere, and change download URL inside AndroidAppSettings.cfg, then recompile .apk file. Then follow instructions here: https://github.com/pelya/commandergenius/tree/sdl_android/project/jni/application/xserver