update installation for OCaml

diff --git a/how_to_get_the_programming_languages_running_on_your_computer.mdwn b/how_to_get_the_programming_languages_running_on_your_computer.mdwn
index 848bd52..6fab52a 100644 (file)
--- a/how_to_get_the_programming_languages_running_on_your_computer.mdwn
+++ b/how_to_get_the_programming_languages_running_on_your_computer.mdwn
@@ -310,7 +310,7 @@ The current version of OCaml is 4.02.1 (released October 2014).
     You can install the current version of OCaml (4.02.1, from October 2014),
     together with the Findlib add-on and OPAM package manager, by opening a Terminal and typing:
 
-        sudo port install ocaml caml-findlib opam
+        sudo port install ocaml ocaml-findlib opam
 
     As with Scheme, it's helpful to also have rlwrap installed, and to start OCaml as `rlwrap ocaml`. This gives
     you a nice history of the commands you've already typed, which you can scroll up and down in with your
@@ -321,10 +321,18 @@ The current version of OCaml is 4.02.1 (released October 2014).
     Use your packaging system, for example, open a Terminal and
     type:
 
-        sudo apt-get install ocaml ocaml-findlib opam
+        sudo apt-get install ocaml opam camlp4-extra ocaml-findlib
 
     That will install a version of OCaml and the Findlib add-on and OPAM package manager.
 
+    If you're using Ubuntu "Utopic" (14.10), there's [a note on the OPAM home page](https://github.com/ocaml/opam)
+    warning that its version of OPAM is broken, and not to use it. Here's how you can get (OCaml and) OPAM from a newer repository:
+
+        sudo apt-get install -y software-properties-common
+        sudo apt-apt-repository -y ppa:avsm/ppa
+        sudo apt-get update
+        sudo apt-get install ocaml opam
+
     If for some reason you can't get OCaml through your
     packaging system, you can go to
     <http://caml.inria.fr/download.en.html>.