It looks like the deb.debian.org URLs in di-sources.list need to be updated
E: Can't download 'stretch' for 'amd64' (http://deb.debian.org/dists/stretch/main/installer-amd64/current/images/MD5SUMS).
The URL should have a leading 'debian/' in the path, ie http://deb.debian.org/dists/stretch/main/installer...I don't know if this is just some mirrors or everywhere, but not having it resulted in an error for me (it resolved to cdn-aws.deb.debian.org)
Thanks, -- Matt Taggart tagg...@debian.org
