... because I forgot about 'you must use tabs in makefiles' It still errors out, but at least build goes past ffmpeg's configure.. I'm trying to hack-in my latest discovery about multidepth x265. So, it really hack - thirdparty/Makefile patched for not creating configure in x265 dir, then Makefile, pseudo 'configure' with just one /bin/true line and multilib.sh script copied into just created folder, and after this CinGG's build system handles the rest ...hopefully (build not yet finished)