I noticed on Paolo's blog that OCaml ships with an ancient version of OCaml (3.11.x) http://www.donadeo.net/post/2014/installing-opam-1-1-1-on-a-cenos-6-5 Jon, Dave, I believe that the CentOS Xen uses a newer version -- are there RPMs available somewhere for CentOS 6.5 that could be used to get OPAM into the distribution there? -anil