title: OCaml: Core package not installing
body: <p>Following the instructions here for Ubuntu: <a href="https://github.com/realworldocaml/book/wiki/Installation-Instructions" rel="nofollow noreferrer">https://github.com/realworldocaml/book/wiki/Installation-Instructions</a>
  I've downloaded OCaml and utop which work. However, the Core module cannot be opened.
  I've downloaded core, async etc as per the instructions.</p>
  
  <p>My edited .ocamlinit file looks like this:</p>
  
  <pre><code>(* Added by OPAM. *)
  let () =
    try Topdirs.dir_directory (Sys.getenv "OCAML_TOPLEVEL_PATH")
    with Not_found -&gt; ()
  ;;
  
  #use "topfind";;
  #thread;;
  #camlp4o;;
  #require "core.top";;
  #require "core.syntax";;
  </code></pre>
  
  <p>When I open utop I get the message that:</p>
  
  <p>No such package: core.top</p>
  
  <p>No such package: core.syntax</p>
  
  <p>If I try to open core by entering "open Core.Std;;" utop returns: "Error: Unbound module Core". I'm assuming that the installation instruction are out of date but I haven't been able to find any alternate instructions that fix the issue. Is there something wrong with my .ocamlinit file?</p>