squashfs-tools pkg uses old sources
squashfs-tools migrated from sourceforge to github (at
https://github.com/plougher/squashfs-tools) for a long time ago.
Git version has some new features (like xattrs, pseudo symlinks) that
doesn’t have cvs version of 2014 year. Also many bugs that currently
fixed by patches was fixed in upstream repo too.
I suggest to update pkg sources to point new repository (unfortunately only some distros does it on that moment, I know only Arch Linux, Gentoo, OpenWRT)
(from redmine: issue id 10045, created on 2019-03-05)