Вот мой список репозитариев (кстати как правильно репозитариев/репозиториев?) для Debian Jessie
# jessie-main
deb http://mirror.yandex.ru/debian/ jessie main
deb-src http://mirror.yandex.ru/debian/ jessie main
# jessie-updates, previously known as 'volatile'
deb http://mirror.yandex.ru/debian/ jessie-updates main contrib
deb-src http://mirror.yandex.ru/debian/ jessie-updates main contrib
# jessie-security
deb http://security.debian.org/ jessie/updates main contrib
deb-src http://security.debian.org/ jessie/updates main contrib
# jessie-nonfree
deb http://ftp.de.debian.org/debian/ jessie main contrib non-free
deb-src http://ftp.de.debian.org/debian/ jessie main contrib non-free
deb http://ftp.de.debian.org/debian/ jessie-updates main contrib non-free
deb-src http://ftp.de.debian.org/debian/ jessie-updates main contrib non-free
# jessie-backports
deb http://ftp.de.debian.org/debian jessie-backports main contrib non-free
deb-src http://ftp.de.debian.org/debian jessie-backports main contrib non-free
А зачем у вас ветки jessie и jessie-updates разделены на main и (contrib, non-free)?
Вот мой:
# cat /etc/apt/sources.list
deb http://mirror.neolabs.kz/debian/ jessie main contrib non-free
deb-src http://mirror.neolabs.kz/debian/ jessie main contrib non-free
deb http://security.debian.org/ jessie/updates main contrib non-free
deb-src http://security.debian.org/ jessie/updates main contrib non-free
# jessie-updates, previously known as 'volatile'
deb http://mirror.neolabs.kz/debian/ jessie-updates main contrib non-free
deb-src http://mirror.neolabs.kz/debian/ jessie-updates main contrib non-free
# jessie-backports
deb http://mirror.neolabs.kz/debian/ jessie-backports main contrib non-free
deb-src http://mirror.neolabs.kz/debian/ jessie-backports main contrib non-free
deb http://deb.debian.org/debian jessie main contrib non-free
deb-src http://deb.debian.org/debian jessie main contrib non-free
deb http://deb.debian.org/debian jessie-updates main contrib non-free
deb-src http://deb.debian.org/debian jessie-updates main contrib non-free
deb http://security.debian.org/ jessie/updates main contrib non-free
deb-src http://security.debian.org/ jessie/updates main contrib non-free