From 53f52c2111bcf339bdaab703a263fd2c001da51c Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Sun, 8 Jul 2012 11:04:11 -0400
Subject: [PATCH] corepkgs/fetchurl: the 'system' argument can be optional

---
 corepkgs/fetchurl.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/corepkgs/fetchurl.nix b/corepkgs/fetchurl.nix
index 72107294c7..3d467fe187 100644
--- a/corepkgs/fetchurl.nix
+++ b/corepkgs/fetchurl.nix
@@ -3,7 +3,7 @@ with import <nix/config.nix>;
 # Argh, this thing is duplicated (more-or-less) in Nixpkgs.  Need to
 # find a way to combine them.
 
-{system, url, outputHash ? "", outputHashAlgo ? "", md5 ? "", sha1 ? "", sha256 ? ""}:
+{system ? builtins.currentSystem, url, outputHash ? "", outputHashAlgo ? "", md5 ? "", sha1 ? "", sha256 ? ""}:
 
 assert (outputHash != "" && outputHashAlgo != "")
     || md5 != "" || sha1 != "" || sha256 != "";