From a911f9989c036fcd64058815fc3033e2742345e7 Mon Sep 17 00:00:00 2001
From: "William A. Kennington III" <william@wkennington.com>
Date: Sun, 30 Nov 2014 01:19:33 -0800
Subject: [PATCH] nixos/networkd: Fix macvlan called with null mode

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

diff --git a/nixos/modules/tasks/network-interfaces-systemd.nix b/nixos/modules/tasks/network-interfaces-systemd.nix
index 334b24b5ad3..997c1804673 100644
--- a/nixos/modules/tasks/network-interfaces-systemd.nix
+++ b/nixos/modules/tasks/network-interfaces-systemd.nix
@@ -124,7 +124,7 @@ in
             Name = name;
             Kind = "macvlan";
           };
-          macvlanConfig.Mode = macvlan.mode;
+          macvlanConfig = optionalAttrs (macvlan.mode != null) { Mode = macvlan.mode; };
         };
         networks."40-${macvlan.interface}" = (mkMerge [ (genericNetwork (mkOverride 999)) {
           macvlan = [ name ];