case "$THIS_SUB_DEPENDS" in
  DRI)
    if [[ "$MESA_GLX" != "dri" ]]; then
     MESA_GLX="dri"
   fi
   ;;
  GLES2)
    if [[ "$MESA_GLES23" != "y" ]]; then
      MESA_GLES23="y"
    fi
    ;;
  *) echo "Unknown sub_depends $THIS_SUB_DEPENDS!"; return 1 ;;
esac
return 0
