Building media-libs/gst-plugins-base in a fresh stage3 is believed to reproduce this. Here are more explicit commands from my notes: mkdir -p /tmp/bug cd /mnt/bug wget https://build.funtoo.org/1.4-release-std/x86-64bit/intel64-haswell/2021-05-05/stage3-intel64-haswell-1.4-release-std-2021-05-05.tar.xz tar -C /tmp/bug --numeric-owner --xattrs --xattrs-include='*' -xpf stage3-intel64-haswell-1.4-release-std-2021-05-05.tar.xz cp /etc/resolv.conf /tmp/bug/etc/resolv.conf mount -t proc none /tmp/bug/proc mount --rbind /dev /tmp/bug/dev mount --rbind /sys /tmp/bug/sys chroot /tmp/bug /bin/bash env-update; source /etc/profile; export PS1="(bug chroot) $PS1"; cd ego update emerge media-libs/gst-plugins-base Note that this is a minimal version of an actual install that was done. It has not been tested in minimal form, but is believed to reproduce by doing this. This is being filed in advance of confirmation (as drobbins asked for a bug to be filed). It will be updated after I have confirmed that these steps work.