From 13841d6e47a54a6ec5c0c501a9d19d23fc081b2d Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Sat, 6 Oct 2012 21:00:26 -0400
Subject: [PATCH] Use nss-myhostname to ensure that the hostname resolves to
 something sensible

---
 modules/config/nsswitch.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/modules/config/nsswitch.nix b/modules/config/nsswitch.nix
index 7c969320b3d..4c46e8ec87d 100644
--- a/modules/config/nsswitch.nix
+++ b/modules/config/nsswitch.nix
@@ -48,7 +48,7 @@ in
             passwd:    files ldap
             group:     files ldap
             shadow:    files ldap
-            hosts:     files ${optionalString nssmdns "mdns_minimal [NOTFOUND=return]"} dns ${optionalString nssmdns "mdns"}
+            hosts:     files ${optionalString nssmdns "mdns_minimal [NOTFOUND=return]"} dns ${optionalString nssmdns "mdns"} myhostname
             networks:  files dns
             ethers:    files
             services:  files
@@ -58,6 +58,11 @@ in
       }
     ];
 
+  # Use nss-myhostname to ensure that our hostname always resolves to
+  # a valid IP address.  It returns all locally configured IP
+  # addresses, or ::1 and 127.0.0.2 as fallbacks.
+  system.nssModules = [ pkgs.nss_myhostname ];
+
   environment.shellInit =
     if config.system.nssModules.path != "" then
       ''