Error Installing Foreman in Debian Jessie with repositories


I have a problem installing foreman via apt. I use

deb jessie 1.8

But when i install with foreman-installer -i i have an error. Foreman-proxy depends ruby-rkerberos. ruby-rkerberos is only in this version ruby-rkerberos_0.1.3-2_amd64.deb <> and not in "all" version. And i cannot install it.

How i can get it in "all" version ???