From df124ebc891b74dc9036bfe6188b012bf3e796d8 Mon Sep 17 00:00:00 2001
From: Rob Vermaas <rob.vermaas@gmail.com>
Date: Thu, 21 Jun 2012 12:47:44 +0200
Subject: [PATCH] * Make sure time.timeZone can only be defined once.

---
 modules/config/timezone.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/config/timezone.nix b/modules/config/timezone.nix
index 59b4a917ebc..5dcf38c462d 100644
--- a/modules/config/timezone.nix
+++ b/modules/config/timezone.nix
@@ -7,6 +7,7 @@ with pkgs.lib;
 
     time.timeZone = mkOption {
       default = "CET";
+      type = with types; uniq string;
       example = "America/New_York";
       description = "The time zone used when displaying times and dates.";
     };