Chicken is on Debian and has an egg that provides most of the scsh functionality.
Re:The Scheme Shell (2006)
by dredmorbius on Saturday August 24, 2019 @09:10PM
(#20790731)
First I've heard of those tools. I am ... amused.
apt search scsch and apt search scheme provide little joy.
... hrm, apparently oldstable (jessie) only:
https://packages.debian.org/search?keywords=scsh