The last time I tried installing Batteries (on OS X) it was a big PITA and it looked like it was dead in the water (this was about 18 months ago).
During the same time using GODI to install a xml processing library completely hosed my system after me foolishly granting it root rights, which killed my OCaml enthusiasm for good.
OCaml is in itself a really nice language (apart from some warts like lack of native multithreading support) but it's tooling, infrastructure and "first developer experience" and lack of progress in these areas in the last years is beyond atrocious (compared to F#, Scala, Clojure, Haskell, Ruby, Python, JavaScript).