From ba757e6a7661ba6286fe5a1bbd05918dde625994 Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Mon, 3 Jul 2017 22:10:07 +0200
Subject: [PATCH] =?UTF-8?q?ocamlPackages.pgocaml:=20requires=20OCaml=20?=
 =?UTF-8?q?=E2=89=A5=204.00?=
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---
 pkgs/development/ocaml-modules/pgocaml/default.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/ocaml-modules/pgocaml/default.nix b/pkgs/development/ocaml-modules/pgocaml/default.nix
index a8b3ed15862..f4d1ef829bb 100644
--- a/pkgs/development/ocaml-modules/pgocaml/default.nix
+++ b/pkgs/development/ocaml-modules/pgocaml/default.nix
@@ -1,4 +1,8 @@
-{ stdenv, fetchurl, buildOcaml, calendar, csv, re }:
+{ stdenv, fetchurl, buildOcaml, ocaml, calendar, csv, re }:
+
+if !stdenv.lib.versionAtLeast ocaml.version "4"
+then throw "pgocaml is not available for OCaml ${ocaml.version}"
+else
 
 buildOcaml {
   name = "pgocaml";