erlang-getopt software package provides Erlang library for command-line processing, 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 erlang-getopt
erlang-getopt is installed in your system.
Make ensure the erlang-getopt package were installed using the commands given below,
$ sudo dpkg-query -l | grep erlang-getopt *
You will get with erlang-getopt package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Development |
| Package | erlang-getopt |
| Version | 0.8.2+dfsg-1 |
| Description | Erlang library for command-line processing |
| Sub Section | devel |