pg17 postinst: 111: db_stop: not found

When installing percona-postgresql-17 on Ubuntu 24.04, one gets an /var/lib/dpkg/info/percona-postgresql-17.postinst: 111: db_stop: not found error.

Log:

...
Setting up percona-postgresql-17 (2:17.0-1.noble) ...
Creating new PostgreSQL cluster 17/main ...
/usr/lib/postgresql/17/bin/initdb -D /var/lib/postgresql/17/main --auth-local peer --auth-host scram-sha-256 --no-instructions
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale "en_US.UTF-8".
The default database encoding has accordingly been set to "UTF8".
The default text search configuration will be set to "english".

Data page checksums are disabled.

fixing permissions on existing directory /var/lib/postgresql/17/main ... ok
creating subdirectories ... ok
selecting dynamic shared memory implementation ... posix
selecting default "max_connections" ... 100
selecting default "shared_buffers" ... 128MB
selecting default time zone ... Etc/UTC
creating configuration files ... ok
running bootstrap script ... ok
performing post-bootstrap initialization ... ok
syncing data to disk ... ok
/var/lib/dpkg/info/percona-postgresql-17.postinst: 111: db_stop: not found
...

PS: Wondering, why the bogus debian bloat still gets used. Thought, percona distribution is a clean enterprise ready version ...

Reproduce the Ubuntu 24.04 installation and inspect /var/lib/dpkg/info/percona-postgresql-17.postinst around line 111, using the included setup log as the expected failure context. Trace why db_stop is unavailable during post-installation and verify that installing percona-postgresql-17 completes without this error.