It looks like the same problem, but with a different package: apt-get --reinstall install libncurses5 Reading Package Lists... Done Building Dependency Tree... Done 0 packages upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 2 not upgraded. Need to get 0B/199kB of archives. After unpacking 0B will be used. Do you want to continue? [Y/n] E: Internal Error, Could not perform immediate configuration Yes, I'm running unstable. Dima.