Hi! Thanks for reporting.
Indeed deb.debian.org is hardcoded in this file: src/container/enable-source-repositories.sh: deb http://deb.debian.org/debian bullseye main src/container/enable-source-repositories.sh: deb http://deb.debian.org/debian-security bullseye-security main src/container/enable-source-repositories.sh: deb http://deb.debian.org/debian bullseye-updates main src/container/enable-source-repositories.sh: URIs: http://deb.debian.org/debian Also the container images most likely also have deb.debian.org hardcoded inside them (as distributed by Debian and Ubuntu) and I am not aware of any handy system to have them updated on the fly. Perhaps have a local DNS that returns deb.debian.org as a local IP that has the closes mirror? I will leave this bug open for suggestions on how to nicely implement automatic local mirror injection.
