From 7b818893947747485c14a1c5bf663b1560e7284e Mon Sep 17 00:00:00 2001
From: Sarah Brofeldt <sbrofeldt@gmail.com>
Date: Mon, 9 Oct 2017 20:52:25 +0200
Subject: [PATCH] nixos/config/timezone: Disallow spaces

---
 nixos/modules/config/timezone.nix | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/config/timezone.nix b/nixos/modules/config/timezone.nix
index aa030a816d04..b15948f6e2e5 100644
--- a/nixos/modules/config/timezone.nix
+++ b/nixos/modules/config/timezone.nix
@@ -5,6 +5,9 @@ with lib;
 let
 
   tzdir = "${pkgs.tzdata}/share/zoneinfo";
+  nospace  = str: filter (c: c == " ") (stringToCharacters str) == [];
+  timezone = types.nullOr (types.addCheck types.str nospace)
+    // { description = "null or string without spaces"; };
 
 in
 
@@ -15,7 +18,7 @@ in
 
       timeZone = mkOption {
         default = null;
-        type = types.nullOr types.str;
+        type = timezone;
         example = "America/New_York";
         description = ''
           The time zone used when displaying times and dates. See <link