These are the resources needed for a fresh install of up to date Debian GNU/kFreeBSD. Despite the difficulties in finding these resources, installation process runs smooth and updating packages for the ""jessie" release works trouble free. This page is primary a reminder for me, but hope could also be useful for other kFreeBSD enthusiasts.
Latest ISO images
Debian 8.4 Installer RC3
http://cdimage.debian.org/
Debian 8.4 Installer from last Jenkins build
http://jenkins.kfreebsd.eu/
Debian 7.11 Installer then apt-get upgrade to 8.x
http://cdimage.debian.org/
Up to date apt/sources.list
# Debian GNU/kFreeBSD "Jessie" 8.x amd64 deb http://httpredir.debian.org/debian jessie-kfreebsd main contrib non-free deb http://httpredir.debian.org/debian jessie-updates main contrib non-free deb http://httpredir.debian.org/debian jessie-backports main contrib non-free deb http://httpredir.debian.org/debian-security jessie-kfreebsd/updates main contrib non-free
It happened in past, and could happen again, that httpredir.debian.org points out to a mirror which has decided not to host a copy of "jessie-kfreebsd".
This is a bad behavior of the mirror, but we cannot impose it to do.
The simplest solution, is to try again to apt-get install, as the next try point out to another mirror and the majority of the mirrors now have jessie-kfreebsd.