From 262c21ed464a2593b54ec274a3b84083c0795f2d Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Thu, 7 Mar 2013 19:42:01 +0100
Subject: Enable __ignoreNulls globally

---
 pkgs/stdenv/generic/default.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'pkgs/stdenv')

diff --git a/pkgs/stdenv/generic/default.nix b/pkgs/stdenv/generic/default.nix
index 26f410cee117..fd7b3218e347 100644
--- a/pkgs/stdenv/generic/default.nix
+++ b/pkgs/stdenv/generic/default.nix
@@ -6,6 +6,12 @@
   fetchurlBoot
 }:
 
+if ! builtins ? langVersion then
+
+  abort "This version of Nixpkgs requires Nix >= 1.2, please upgrade!"
+
+else
+
 let
 
   lib = import ../../lib;
@@ -30,6 +36,8 @@ let
 
         propagatedUserEnvPkgs = [gcc] ++
           lib.filter lib.isDerivation initialPath;
+
+        __ignoreNulls = true;
       }
 
       // rec {
-- 
cgit 1.4.1