From 83ca2c272a8952828f17c5aa8f918561ca798f8a Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Wed, 19 Feb 2014 13:36:39 +0100
Subject: [PATCH] =?UTF-8?q?fetchurl:=20Ensure=20that=20=E2=80=98urls?=
 =?UTF-8?q?=E2=80=99=20is=20a=20list?=
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---
 pkgs/build-support/fetchurl/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/build-support/fetchurl/default.nix b/pkgs/build-support/fetchurl/default.nix
index 294d9a43ef7..af4a6700153 100644
--- a/pkgs/build-support/fetchurl/default.nix
+++ b/pkgs/build-support/fetchurl/default.nix
@@ -66,6 +66,7 @@ in
   showURLs ? false
 }:
 
+assert builtins.isList urls;
 assert urls != [] -> url == "";
 assert url != "" -> urls == [];