Hi,

1. I believe you should place the lib in lisp-xyz.scm.

2. License is llgpl.

3. Then use the asdf-build-system/sbcl.
See the other sbcl- packages for reference.

Then define the cl- package with

--8<---------------cut here---------------start------------->8---
(define-public cl-cmn
  (sbcl-package->cl-source-package sbcl-cmn))
--8<---------------cut here---------------end--------------->8---

4. Since there are no version numbers, maybe use the date of the last
HISTORY.cmn entry, that is, 2016.8.17.

Hope that helps!