diff --git a/system/options.nix b/system/options.nix
index fdb224b6788d..53a3d11d7f66 100644
--- a/system/options.nix
+++ b/system/options.nix
@@ -245,29 +245,6 @@ in
       ";
     };
 
-    interfaceMonitor = {
-
-      enable = mkOption {
-        default = false;
-        description = "
-          If <literal>true</literal>, monitor Ethernet interfaces for
-          cables being plugged in or unplugged.  When this occurs, the
-          <command>dhclient</command> service is restarted to
-          automatically obtain a new IP address.  This is useful for
-          roaming users (laptops).
-        ";
-      };
-
-      beep = mkOption {
-        default = false;
-        description = "
-          If <literal>true</literal>, beep when an Ethernet cable is
-          plugged in or unplugged.
-        ";
-      };
-
-    };
-
     defaultMailServer = {
 
       directDelivery = mkOption {
@@ -428,6 +405,7 @@ in
     (import ../upstart-jobs/maintenance-shell.nix) # Handles the maintenance/stalled event (single-user shell).
     (import ../upstart-jobs/ctrl-alt-delete.nix) # Ctrl-alt-delete action.
     (import ../upstart-jobs/halt.nix) # FIXME (assertion) # Handles the reboot/halt events.
+    (import ../upstart-jobs/ifplugd.nix) # ifplugd daemon for monitoring Ethernet cables.
 
 
     # security
diff --git a/upstart-jobs/default.nix b/upstart-jobs/default.nix
index 85c5622bf4d8..57f0006eb8a3 100644
--- a/upstart-jobs/default.nix
+++ b/upstart-jobs/default.nix
@@ -70,13 +70,6 @@ let
 
   jobs = map makeJob []
 
-  # ifplugd daemon for monitoring Ethernet cables.
-  ++ optional config.networking.interfaceMonitor.enable
-    (import ../upstart-jobs/ifplugd.nix {
-      inherit (pkgs) ifplugd writeScript bash;
-      inherit config;
-    })
-
   # User-defined events.
   ++ (map makeJob (config.services.extraJobs));
 
diff --git a/upstart-jobs/ifplugd.nix b/upstart-jobs/ifplugd.nix
index 4536ee8b41e5..c1b9c4e56204 100644
--- a/upstart-jobs/ifplugd.nix
+++ b/upstart-jobs/ifplugd.nix
@@ -1,7 +1,42 @@
-{ifplugd, config, writeScript, bash}:
+{pkgs, config, ...}:
+
+###### interface
+let
+  inherit (pkgs.lib) mkOption mkIf;
+
+  options = {
+    networking = {
+      interfaceMonitor = {
+
+        enable = mkOption {
+          default = false;
+          description = "
+            If <literal>true</literal>, monitor Ethernet interfaces for
+            cables being plugged in or unplugged.  When this occurs, the
+            <command>dhclient</command> service is restarted to
+            automatically obtain a new IP address.  This is useful for
+            roaming users (laptops).
+          ";
+        };
+
+        beep = mkOption {
+          default = false;
+          description = "
+            If <literal>true</literal>, beep when an Ethernet cable is
+            plugged in or unplugged.
+          ";
+        };
+      };
+    };
+  };
+in
+
+###### implementation
 
 let
 
+  inherit (pkgs) ifplugd writeScript bash;
+
   # The ifplugd action script, which is called whenever the link
   # status changes (i.e., a cable is plugged in or unplugged).  We do
   # nothing when a cable is unplugged.  When a cable is plugged in, we
@@ -17,19 +52,27 @@ let
 
 in 
 
-{
-  name = "ifplugd";
+mkIf config.networking.interfaceMonitor.enable {
+  require = [
+    options
+  ];
 
-  extraPath = [ifplugd];
-  
-  job = "
-description \"Network interface connectivity monitor\"
+  services = {
+    extraJobs = [{
+      name = "ifplugd";
 
-start on network-interfaces/started
-stop on network-interfaces/stop
+      extraPath = [ifplugd];
+      
+      job = ''
+        description "Network interface connectivity monitor"
 
-respawn ${ifplugd}/sbin/ifplugd --no-daemon --no-startup --no-shutdown \\
-    ${if config.networking.interfaceMonitor.beep then "" else "--no-beep"} \\
-    --run ${plugScript}";
-  
+        start on network-interfaces/started
+        stop on network-interfaces/stop
+
+        respawn ${ifplugd}/sbin/ifplugd --no-daemon --no-startup --no-shutdown \
+            ${if config.networking.interfaceMonitor.beep then "" else "--no-beep"} \
+            --run ${plugScript}
+      '';
+    }];
+  };
 }