elk binary package in Ubuntu Focal armhf

 Elk is an implementation of the Scheme programming language, designed
 specifically as an embeddable, reusable extension language subsystem for
 applications written in C or C++.
 .
 This package contains the Elk Scheme interpreter, as well as several plugins
 shipped with Elk. They provide hooks for Unix system calls, the X Window
 System, as well as the X Athena Widgets and the Motif toolkits. Example
 scripts on how to use these plugins are provided in the elkdoc package.

Source package