I think I finally have all the cmake change shenanigans fixed but now I'm running into this: - Checking for VAPOURSYNTH -- *********************** -- Checking for module 'vapoursynth-script' -- Found vapoursynth-script, version 48 -- VSSCRIPT<-I/usr/include/vapoursynth;-I/usr/include/python3.9> < -lvapoursynth-script;-lvapoursynth> <vapoursynth-script;vapoursynth> CMake Error at /usr/share/cmake/Modules/GetPrerequisites.cmake:843 (message): /usr/bin/ldd failed: 1 ldd: error: you do not have read permission for `/usr/lib64/libvapoursynth-script.so' Call Stack (most recent call first): /builddir/build/BUILD/avidemux_2.7.6/fakeRoot/usr/include/avidemux/2.7/cmake/admCheckVapourSynth.cmake:7 (GET_PREREQUISITES) /builddir/build/BUILD/avidemux_2.7.6/fakeRoot/usr/include/avidemux/2.7/cmake/admCheckVapourSynth.cmake:32 (GET_VAPOURSYNTH_PYTHON) ADM_demuxers/VapourSynth/CMakeLists.txt:3 (checkVapourSynth) So following the error I went into the mock chroot but everything looks fine: <mock-chroot> sh-5.0# ls -l /usr/lib64/libvap* lrwxrwxrwx. 1 root root 30 Jul 30 10:37 /usr/lib64/libvapoursynth-script.so -> libvapoursynth-script.so.0.0.0 lrwxrwxrwx. 1 root root 30 Jul 30 10:37 /usr/lib64/libvapoursynth-script.so.0 -> libvapoursynth-script.so.0.0.0 -rwxr-xr-x. 1 root root 28632 Jul 30 10:38 /usr/lib64/libvapoursynth-script.so.0.0.0 lrwxrwxrwx. 1 root root 24 Jul 30 10:37 /usr/lib64/libvapoursynth.so -> libvapoursynth.so.48.0.0 lrwxrwxrwx. 1 root root 24 Jul 30 10:37 /usr/lib64/libvapoursynth.so.48 -> libvapoursynth.so.48.0.0 -rwxr-xr-x. 1 root root 1264464 Jul 30 10:38 /usr/lib64/libvapoursynth.so.48.0.0 Ideas? Thanks, Richard