cl-contextl software package provides context orientation for Common Lisp, 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-contextl
cl-contextl is installed in your system.
Make ensure the cl-contextl package were installed using the commands given below,
$ sudo dpkg-query -l | grep cl-contextl *
You will get with cl-contextl package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Lisp |
| Package | cl-contextl |
| Version | 1:0.61-1 |
| Description | context orientation for Common Lisp |
| Sub Section | Lisp |