checking for libebml version >= 0.7.2... 0.7.2 checking for libmatroska version >= 0.7.4... 0.7.3 *** Your Matroska version is too old. Upgrade to at least version *** 0.7.4 and re-run configure. !!! ERROR: media-video/mkvtoolnix-0.9.7 failed. !!! Function src_compile, Line 36, Exitcode 1 !!! configure died !!! If you need support, post the topmost build error, NOT this status message. So, the libmatroska depend must be changed to >=0.7.4
Done, thanks for the hint.