Install cl-rss by entering the following commands in the terminal:
sudo apt update sudo apt install cl-rss
Description:
Common Lisp RSS processor
This package provides a Common Lisp library for fetching and parsing Remote Site Summary data via HTTP. Currently, it supports RSS versions 0.90, 0.91, and 0.92 as well as RSS version 2.
Homepage: http://files.b9.com/cl-rss/
Version: 0.9.1-1
Section: universe/devel