From f90d6ec47d3bf5dc9b060350b095067513339b36 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Wed, 19 May 2010 12:26:12 +0000
Subject: [PATCH] pkgs/os-specific/linux/hal/default.nix: deal with 'udev'
 being null

svn path=/nixpkgs/trunk/; revision=21870
---
 pkgs/os-specific/linux/hal/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/os-specific/linux/hal/default.nix b/pkgs/os-specific/linux/hal/default.nix
index 74b6f2618472..6d870ebf453b 100644
--- a/pkgs/os-specific/linux/hal/default.nix
+++ b/pkgs/os-specific/linux/hal/default.nix
@@ -45,7 +45,7 @@ stdenv.mkDerivation rec {
     do
       substituteInPlace $i \
         --replace /usr/sbin/dmidecode ${dmidecode}/sbin/dmidecode \
-        --replace /sbin/udevadm ${udev}/sbin/udevadm \
+        ${if udev != null then "--replace /sbin/udevadm ${udev}/sbin/udevadm" else ""} \
         --replace /bin/mount ${utillinuxng}/bin/mount \
         --replace /bin/umount ${utillinuxng}/bin/umount \
         --replace /usr/bin/pm-is-supported ${pmutils}/bin/pm-is-supported \