-WESTONSTART_append = " ${@bb.utils.contains("IMAGE_FEATURES", "debug-tweaks", " --log=${DISPLAY_XDG_RUNTIME_DIR}/compositor.log", "",d)}"
-WESTONSTART_append = " ${@bb.utils.contains("DISTRO_FEATURES", "agl-devel", " --debug", "",d)}"
+WESTONSTART:append = " ${@bb.utils.contains("IMAGE_FEATURES", "debug-tweaks", " --log=${DISPLAY_XDG_RUNTIME_DIR}/compositor.log", "",d)}"
+WESTONSTART:append = " ${@bb.utils.contains("DISTRO_FEATURES", "agl-devel", " --debug", "",d)}"
+WESTONSTART:append = " ${@bb.utils.contains("WESTON_USE_PIXMAN", "1", " --use-pixman", "",d)}"