These ebuilds come from http://sourceforge.net/projects/gechi-overlay/.
If you have some problems, go to the official site first.
sapec-ng : Sapec-NG is a symbolic analysis program for linear analog circuits ( http://cirlab.det.unifi.it/sapec_ng/ )
sapwin : Sapec-NG is a symbolic analysis program for linear analog circuits ( http://cirlab.det.unifi.it/Sapwin/" einfo "${HOMEPAGE} )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gechi
For Paludis use this rsync : rsync://gentoo.zugaina.org/gechi-portage
If you have a problem : ycarus(-at-)zugaina.org