ulubis-sdl is a backend for the ulubis window compositor. It allows ulubis to run on X via SDL.
ulubis-sdl requires: cffi and cl-sdl2.
After installing ulubis with (ql:quickload :ulubis), scripts in the build directory will automatically download ulubis-sdl. Otherwise you can run (ql:quickload :ulubis-sdl) directly.