Renaming the ebuild works, programm runs fine besides bug 420677 Thanks
bumped, thanks. +*unison-2.45.4 (11 Jun 2012) + + 11 Jun 2012; Benda Xu <heroxbd@gentoo.org> +unison-2.45.4.ebuild: + bump to beta version of 2.45.4, bug 420679. Thanks to xmw