From ffc0e2f4fc63f3a2d028dbd7d981223fb19cbeb4 Mon Sep 17 00:00:00 2001
From: Eric Sagnes <eric.sagnes@gmail.com>
Date: Fri, 4 Nov 2016 13:05:44 +0900
Subject: [PATCH] network-interfaces module: use enum

---
 nixos/modules/tasks/network-interfaces.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos/modules/tasks/network-interfaces.nix b/nixos/modules/tasks/network-interfaces.nix
index aae4dc5fdadf..1faa8abd5f7f 100644
--- a/nixos/modules/tasks/network-interfaces.nix
+++ b/nixos/modules/tasks/network-interfaces.nix
@@ -245,7 +245,7 @@ let
 
       virtualType = mkOption {
         default = null;
-        type = types.nullOr (types.addCheck types.str (v: v == "tun" || v == "tap"));
+        type = with types; nullOr (enum [ "tun" "tap" ]);
         description = ''
           The explicit type of interface to create. Accepts tun or tap strings.
           Also accepts null to implicitly detect the type of device.