xdg-desktop-portal : Desktop integration portal ( https://flatpak.org/ https://github.com/flatpak/xdg-desktop-portal )
xdg-desktop-portal-gtk : portal backend implementation that is using GTK+ and various pieces of GNOME ( https://flatpak.org/ https://github.com/flatpak/xdg-desktop-portal-gtk )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a sorrow
For Paludis use this rsync : rsync://gentoo.zugaina.org/sorrow-portage
If you have a problem : ycarus(-at-)zugaina.org