These ebuilds come from http://dev.gentoo.org/~dberkholz/overlay/.
If you have some problems, go to the official site first.
guile-lib : An accumulation place for pure-scheme Guile modules ( home.gna.org/guile-lib/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a zugaina
For Paludis use this rsync : rsync://gentoo.zugaina.org/zugaina-portage
If you have a problem : ycarus(-at-)zugaina.org