Currently iolib.syscalls depends on changes to cffi that haven't yet been merged into the official repository, so until then you need to use http://common-lisp.net/~sionescu/darcs/cffi -- Stelian Ionescu a.k.a. fe[nl]ix Quidquid latine dictum sit, altum videtur. http://common-lisp.net/project/iolib