On an adjacent matter, there's a minor issue that https://sources.debian.org/src/xen-tools/4.9.2-1/hooks/common/20-setup-apt#L38 reports use of a proxy even when there is none.
- Bug#1079087: xen-create-image does not use /etc/apt/sources.list mirr... Mike
- Bug#1079087: xen-create-image does not use /etc/apt/sources.list... Mike
