* Bump the number of maximum open files for Nix builders.

Our VM builds were causing Samba to go over this limit.

svn path=/nixos/trunk/; revision=16960

modules/services/misc/nix-daemon.nix

@@ -230,6 +230,11 @@ in
           ${config.nix.envVars}
           exec nice -n ${builtins.toString config.nix.daemonNiceLevel} ${nix}/bin/nix-worker --daemon > /dev/null 2>&1
         '';
+
+      extraConfig = 
+        ''
+          limit nofile 4096 4096
+        '';
     };
 
   environment.shellInit =

modules/system/upstart/upstart.nix

@@ -60,6 +60,8 @@ let
               ${job.postStop}
             end script
           '' else ""}
+
+          ${job.extraConfig}
         '';
 
     in
@@ -238,6 +240,15 @@ in
           '';
         };
 
+        extraConfig = mkOption {
+          type = types.string;
+          default = "";
+          example = "limit nofile 4096 4096";
+          description = ''
+            Additional Upstart stanzas not otherwise supported.
+          '';
+        };
+
       };
       
     };