Install cl-postgres by entering the following commands in the terminal:
sudo apt update sudo apt install cl-postgres
Description:
Low-level client library for PosgreSQL
CL-postgres module implements a rather low-level interface for communicating with a PostgreSQL database server. It is part of the Postmodern library, but can be used separately.
Homepage: http://marijnhaverbeke.nl/postmodern/
Version: 20170403-1
Section: universe/lisp