liblarch : Library to handle directed acyclic graphs ( https://wiki.gnome.org/Projects/liblarch )
pivy : Coin3D bindings for Python ( https://github.com/coin3d/pivy )
pyside2-tools : PySide development tools (lupdate, rcc, uic) ( https://wiki.qt.io/PySide2 )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a einflay
For Paludis use this rsync : rsync://gentoo.zugaina.org/einflay-portage
If you have a problem : ycarus(-at-)zugaina.org