2.6.2.3 Running the server standalone

This also works

$ sbcl

...
(push #p"~/dir/to/sly" asdf:*central-registry*)
(asdf:load-system :slynk)
(slynk:create-server :port 4008)

Now in Emacs you can do sly-connect and give it the host and the 4008 port as a destination.