Irill is now providing a valuable service to the OCaml community, via a static analysis of the packages present in the Opam repository, based on technology developed in the Mancoosi project.
On http://ows.irill.org it is now possible to find an overview of the OCaml packages that can or cannot be properly installed, with detailed explanations of the reasons for the failures.
More detailed information can be found in this blog article.