Install cl-anaphora by entering the following commands in the terminal:
sudo apt update sudo apt install cl-anaphora
Description:
Common Lisp Anaphoric Macro Collection
Anaphora is the anaphoric macro collection from Hell: it includes many new fiends in addition to old friends like AIF and AWHEN. Anaphora is in the Public Domain.
Homepage: http://common-lisp.net/project/anaphora/
Version: 20170227-1
Section: universe/lisp