Hi,
The CFFI web page http://common-lisp.net/project/cffi/ points to the git repository http://common-lisp.net/gitweb?p=projects/cffi/cffi.git, but that is no longer the official git repository for CFFI, it is on github now. The cl.net repo is severely out of date (master looks OK, but the fsbv branch is ancient and libffi doesn't even show). The web page should point to github, and the cl.net repo should either be deleted or synced up with github.
Thanks, Liam