From 33a5a132e574bf2ef41a7285edb03f2a71098a19 Mon Sep 17 00:00:00 2001
From: Florent Becker <Florent.Becker@ens-lyon.org>
Date: Mon, 30 May 2016 18:18:09 +0200
Subject: [PATCH] eliom 5.0 is only available with a ppx-enabled ocaml

---
 pkgs/top-level/all-packages.nix | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ea416f730e3..86c5329a14a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4908,7 +4908,10 @@ in
 
     eff = callPackage ../development/interpreters/eff { };
 
-    eliom = callPackage ../development/ocaml-modules/eliom { };
+    eliom =
+       if lib.versionAtLeast ocaml_version "4.02"
+       then callPackage ../development/ocaml-modules/eliom { }
+       else null;
 
     enumerate = callPackage ../development/ocaml-modules/enumerate { };