ecl software package provides Embeddable Common-Lisp: has an interpreter and can compile to C, 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 ecl
ecl is installed in your system.
Make ensure the ecl package were installed using the commands given below,
$ sudo dpkg-query -l | grep ecl *
You will get with ecl package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Development |
| Package | ecl |
| Version | 15.3.7+dfsg1-1+b1 [mips, mipse |
| Description | Embeddable Common-Lisp: has an interpreter and can compile to C |
| Sub Section | devel |