The dot package is identified as a required package for the Documentation, and already marked as a required dependency with meson. If meson can not find 'dot', then the documentation will not be built, so we can explicitly enable it in our Doxyfile. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>