On sid dist-upgrading requires some handholding currently:
(SID)root@argenau:/# DEBIAN_FRONTEND=noninteractive apt-get --purge dist-upgrade
[...]
Calculating upgrade... Failed
The following packages have unmet dependencies:
e2fsprogs: PreDepends: libuuid1 (>= 1.34-1) but it is not going to be installed
mount: PreDepends: libuuid1 but it is not going to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
The reason is the
recently started upgrade
to perl 5.10. This makes many packages temporarily uninstallable, (including
lintian) but perhaps you need to upgrade to perl-5.10 now
nevertheless. apt seems to stumble over debconf-i18n,
apt-get --purge install debconf-english
lets dist-upgrade succeed.