Postgres default port changed from 5432 to 5433

Environments Linux
8

Yeah, it’s a private build so I can’t link to it, but the only line that changed during the installation process is the one showing the port below (previously it was identical but said 5432). I verified by putting it in debug mode that that postgresql.conf installed now contains 5433 as the default port instead of 5432. A default port of 5432 is what gets installed when I follow this exact same procedure on an ubuntu box external to travis.

Failing

selecting default shared_buffers ... 128MB
selecting default timezone ... UTC
selecting dynamic shared memory implementation ... posix
creating configuration files ... ok
running bootstrap script ... ok
performing post-bootstrap initialization ... ok
syncing data to disk ... ok
Success. You can now start the database server using:
    pg_ctlcluster 11 main start
Ver Cluster Port Status Owner    Data directory              Log file
11  main    5433 down   postgres /var/lib/postgresql/11/main /var/log/postgresql/postgresql-11-main.log
update-alternatives: using /usr/share/postgresql/11/man/man1/postmaster.1.gz to provide /usr/share/man/man1/postmaster.1.gz (postmaster.1.gz) in auto mode
Processing triggers for libc-bin (2.23-0ubuntu11) ...

Passing

selecting default shared_buffers ... 128MB
selecting default timezone ... UTC
selecting dynamic shared memory implementation ... posix
creating configuration files ... ok
running bootstrap script ... ok
performing post-bootstrap initialization ... ok
syncing data to disk ... ok
Success. You can now start the database server using:
    pg_ctlcluster 11 main start
Ver Cluster Port Status Owner    Data directory              Log file
11  main    5432 down   postgres /var/lib/postgresql/11/main /var/log/postgresql/postgresql-11-main.log
update-alternatives: using /usr/share/postgresql/11/man/man1/postmaster.1.gz to provide /usr/share/man/man1/postmaster.1.gz (postmaster.1.gz) in auto mode
Processing triggers for libc-bin (2.23-0ubuntu11) ...

And then when I try to execute psql without specifying a port (because it expects the normal default of 5432):

Failing

$ psql -c 'create database my_test;' -U postgres
psql: could not connect to server: No such file or directory
	Is the server running locally and accepting
	connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
The command "psql -c 'create database my_test;' -U postgres" failed and exited with 2 during .

Passing

$ psql -c 'create database my_test;' -U postgres
CREATE DATABASE