From fec95a40f1d4eba786f8404b4dcc5dc1de15393f Mon Sep 17 00:00:00 2001
From: Svein Ove Aas <sveina@gmail.com>
Date: Sun, 25 Dec 2016 23:32:40 +0100
Subject: [PATCH] ddclient: Don't include blank server= lines.

---
 nixos/modules/services/networking/ddclient.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/nixos/modules/services/networking/ddclient.nix b/nixos/modules/services/networking/ddclient.nix
index d1900deceaf6..5928203368d2 100644
--- a/nixos/modules/services/networking/ddclient.nix
+++ b/nixos/modules/services/networking/ddclient.nix
@@ -132,7 +132,8 @@ in
         login=${config.services.ddclient.username}
         password=${config.services.ddclient.password}
         protocol=${config.services.ddclient.protocol}
-        server=${config.services.ddclient.server}
+        ${let server = config.services.ddclient.server; in
+          lib.optionalString (server != "") "server=${server}"}
         ssl=${if config.services.ddclient.ssl then "yes" else "no"}
         wildcard=YES
         ${config.services.ddclient.domain}