The source project of this merge request has been removed.
without /etc/ld.so.cache available in the sandbox, tests fail on gentoo with: /usr/bin/ffmpeg: error while loading shared libraries: libstdc++.so.6: cannot open shared object file: No such file or directory
build-fail.log build-fixed.log
see https://gitlab.gnome.org/GNOME/gnome-desktop/commit/f4dcb2f2a9f0593ca8f8da6acfe553eaf7600aea for a more in depth explanation.