From 4e0a95294bd935a9fb1d18cb8a8dd9525ac41671 Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Sun, 22 Oct 2017 10:21:34 +0000
Subject: [PATCH] gringo: use scons version 2

Using version 3 breaks some OCaml packages (namely ppx_deriving_yojson).
---
 pkgs/top-level/all-packages.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index dfacf209926..bfb50c82969 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1103,7 +1103,7 @@ with pkgs;
 
   gosu = callPackage ../tools/misc/gosu { };
 
-  gringo = callPackage ../tools/misc/gringo { };
+  gringo = callPackage ../tools/misc/gringo { scons = scons_2_5_1; };
 
   gti = callPackage ../tools/misc/gti { };