Hi, I appreciate any guidance on how to accomplish this. I'm using MIT Scheme 9.1.1. I followed the README here: https://github.com/ecraven/mit-scheme-swank https://github.com/slime/slime/blob/master/contrib/swank-mit-scheme.scm I added the following to ~/.scheme.init (load-option 'format) (load "~/.emacs.d/lisp/swank.scm" (->environment '(runtime swank))) and added relevant portions of swank.scm and swank-mit-scheme.scm to .emacs suggested by : There is an abort issue when starting MIT REPL: M-x run-mit Image saved on Saturday December 3, 2016 at 9:44:07 AM Release 9.1.1 || Microcode 15.3 || Runtime 15.7 || SF 4.41 || LIAR/x86-64 4.118 || Edwin 3.116 ;Loading "/home/np/.scheme.init"... ; Loading "format.com"... done ; Loading "swank.scm"... aborted I also see the following error when *inferior-lisp* buffer starts with MIT Scheme: ;Unbound variable: create-package-from-description Which is called in swank-mit-scheme.scm elisp code for (mit-scheme-init). Under the mode line keep saying Polling /tmp/slime, which I assume is due a non working connection. Appreciate any guidance. Thanks