cl-xlunit software package provides Common Lisp eXtreme Lisp Unit Testing Package, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install cl-xlunit
cl-xlunit is installed in your system.
Make ensure the cl-xlunit package were installed using the commands given below,
$ sudo dpkg-query -l | grep cl-xlunit *
You will get with cl-xlunit package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Lisp |
| Package | cl-xlunit |
| Version | 0.6.3-2 |
| Description | Common Lisp eXtreme Lisp Unit Testing Package |
| Sub Section | Lisp |