From 847b7fe6976d95a08c76b4ef1e52bb4e329438c2 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Mon, 17 Nov 2014 15:21:29 +0100
Subject: [PATCH] perl: Fix evaluation on Darwin

---
 pkgs/development/interpreters/perl/5.20/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/interpreters/perl/5.20/default.nix b/pkgs/development/interpreters/perl/5.20/default.nix
index 66a9ca597a4..bfd2c26bf70 100644
--- a/pkgs/development/interpreters/perl/5.20/default.nix
+++ b/pkgs/development/interpreters/perl/5.20/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, enableThreading ? true }:
+{ stdenv, fetchurl, enableThreading ? stdenv ? glibc }:
 
 # We can only compile perl with threading on platforms where we have a
 # real glibc in the stdenv.