Debian 11 `bullseye` changed distribution layout.
deb {{ debian_mirror }} {{ debian_distr }} main non-free contrib
deb {{ debian_mirror }} {{ debian_distr }}-updates main non-free contrib
-deb {{ debian_mirror }}-security {{ debian_distr }}/updates main non-free contrib
+deb {{ debian_mirror }}-security {{ debian_distr }}-security main non-free contrib
#deb {{ debian_mirror }} {{ debian_distr }}-backports main non-free contrib
{% if inventory_hostname in ('localhost', 'iskra-aviel.phdru.name') %}