aalib1 software package provides virtual package provided by libaa1, 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 aalib1
aalib1 is installed in your system.
Make ensure the aalib1 package were installed using the commands given below,
$ sudo dpkg-query -l | grep aalib1*
You will get with aalib1 package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Virtual packages |
| Package | aalib1 |
| Version | |
| Description | virtual package provided by libaa1 |
| Sub Section | Virtual |