CLOCC includes a library PORT which unifies many things across different implementations, such as socket interfaces, shell access, and gray streams.

A Debian package of it exists. It uses common-lisp-controller and should be simple to install. Please look on the Debian-page for details.

Compatibility layers need to be kept up to date in order to be useful, and this one isn't. For example, mop.lisp doesn't support CCL.