cl-flexi-streams software package provides Flexi-streams: Flexible bivalent streams 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-flexi-streams
cl-flexi-streams is installed in your system.
Make ensure the cl-flexi-streams package were installed using the commands given below,
$ sudo dpkg-query -l | grep cl-flexi-streams *
You will get with cl-flexi-streams package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Lisp |
| Package | cl-flexi-streams |
| Version | 1.0.7-2 |
| Description | Flexi-streams: Flexible bivalent streams for Common Lisp |
| Sub Section | Lisp |