From 6c9931c55689ca668c6e0d3cff215b61f05b8ce8 Mon Sep 17 00:00:00 2001
From: Jakob Gillich <jakob@gillich.me>
Date: Mon, 7 Dec 2015 04:54:48 +0100
Subject: [PATCH] shout: fix preStart, fixes #11516

preStart must be a string
---
 nixos/modules/services/networking/shout.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos/modules/services/networking/shout.nix b/nixos/modules/services/networking/shout.nix
index f55b87a9614..fe3cba8f149 100644
--- a/nixos/modules/services/networking/shout.nix
+++ b/nixos/modules/services/networking/shout.nix
@@ -57,7 +57,7 @@ in {
       wantedBy = [ "multi-user.target" ];
       wants = [ "network-online.target" ];
       after = [ "network-online.target" ];
-      preStart = if isNull cfg.configFile then null
+      preStart = if isNull cfg.configFile then ""
                  else ''
                    ln -sf ${pkgs.writeText "config.js" cfg.configFile} \
                           ${shoutHome}/config.js