I upgraded successfully on our test machine from V11 to V12 the other day. Now it is time to upgrade the production machine. One f the lessons learned in doing this is to do "make install" on all the extensions used in the existing DB before doing the pg_dropcluster. On the production machine I am confused by the state of the V12 server: If I do sudo apt-get install postgresql-12 I get a message about this package being marked to be "manually installed: pg_lsclusters reports on a version 11 instance: stan@smokey:~/src/pgemailaddr-master$ pg_lsclusters Ver Cluster Port Status Owner Data directory Log file 11 main 5432 online postgres /var/lib/postgresql/11/main /var/log/postgresql/postgresql-11-main.log And when I do a "make install" on one of the extensions, it installs in the V11 location. What do I need to do to get the V12 server package correctly installed? Thanks, in advance. -- "They that would give up essential liberty for temporary safety deserve neither liberty nor safety." -- Benjamin Franklin