After a look at `/var/log/dist-upgrade/main.log` it looks like postgis was in fault.
sudo apt-get remove postgresql-9.2-postgis-2.1 sudo apt-get remove postgresql-9.4-postgis-2.1
Allow the upgrade to launch (it will install postgresql-9.5-postgis-2.2)
After a look at `/var/log/ dist-upgrade/ main.log` it looks like postgis was in fault.
sudo apt-get remove postgresql- 9.2-postgis- 2.1 9.4-postgis- 2.1
sudo apt-get remove postgresql-
Allow the upgrade to launch (it will install postgresql- 9.5-postgis- 2.2)