dua-cli : dua (- Disk Usage Analyzer) is a tool to conveniently learn about the usage of disk space of a given directory ( https://github.com/Byron/dua-cli )
f2fs-tools : Tools for Flash-Friendly File System (F2FS) ( https://git.kernel.org/cgit/linux/kernel/git/jaegeuk/f2fs-tools.git/about/ )
udisks : Daemon providing interfaces to work with storage devices ( https://www.freedesktop.org/wiki/Software/udisks )
xfsprogs : XFS filesystem utilities ( https://xfs.wiki.kernel.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a pg_overlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/pg_overlay-portage
If you have a problem : ycarus(-at-)zugaina.org