zaz: fix build
commit 7aeac03 (PR #386495) dropped libX11 and libGLU from propagatedBuildInputs in SDL_compat, and #389106 pointed SDL to SDL_compat, which broke this buildHydra failure: https://hydra.nixos.org/build/292774821
Grimmauld 11 months ago 8f57521d 2341cd6a