On the long road to packaging Next browser (bug #32729), I've hit a big obstacle: packaging the SLIME/SWANK dependency. We currently have an emacs-slime package, but that cannot be used as a Common Lisp dependency. See those conversations: https://lists.gnu.org/archive/html/guix-devel/2018-08/msg00138.html and https://github.com/slime/slime/issues/457 -- Pierre Neidhardt https://ambrevar.xyz/