diff --git a/system/options.nix b/system/options.nix
index 7299af54443..7ad09b1deb3 100644
--- a/system/options.nix
+++ b/system/options.nix
@@ -2781,18 +2781,6 @@ root        ALL=(ALL) SETENV: ALL
   };
 
 
-  sound = {
-
-    enable = mkOption {
-      default = true;
-      description = "
-        Whether to enable ALSA sound.
-      ";
-    };
-
-  };
-
-
   i18n = {
 
     defaultLocale = mkOption {
@@ -2943,5 +2931,8 @@ root        ALL=(ALL) SETENV: ALL
     (import ../upstart-jobs/disnix.nix)
     (import ../upstart-jobs/cron.nix)
     (import ../upstart-jobs/cron/locate.nix)
+
+    # sound
+    (import ../upstart-jobs/alsa.nix)
   ];
 }
diff --git a/upstart-jobs/alsa.nix b/upstart-jobs/alsa.nix
index df6f632973c..d5cb327d611 100644
--- a/upstart-jobs/alsa.nix
+++ b/upstart-jobs/alsa.nix
@@ -1,50 +1,92 @@
-{modprobe, alsaUtils}:
+# ALSA sound support.
+{pkgs, config}:
 
+###### interface
 let
+  inherit (pkgs.lib) mkOption;
+
+  options = {
+    sound = {
+
+      enable = mkOption {
+        default = true;
+        description = "
+          Whether to enable ALSA sound.
+        ";
+        merge = pkgs.lib.mergeEnableOption;
+      };
+
+    };
+  };
+in
+
+###### implementation
+let
+  ifEnable = pkgs.lib.ifEnable config.sound.enable;
+
+  # dangerous !
+  modprobe = config.system.sbin.modprobe;
+  inherit (pkgs) alsaUtils;
 
   soundState = "/var/lib/alsa/asound.state";
 
-in
-  
-{
-  name = "alsa";
-
-  extraPath = [alsaUtils];
-
   # Alsalib seems to require the existence of this group, even if it's
   # not used (e.g., doesn't own any devices).
-  groups = [
-    { name = "audio";
-      gid = (import ../system/ids.nix).gids.audio;
-    }
+  group = {
+    name = "audio";
+    gid = (import ../system/ids.nix).gids.audio;
+  };
+
+  job = {
+    name = "alsa";
+
+    job = ''
+      start on udev
+      stop on shutdown
+
+      start script
+
+          mkdir -m 0755 -p $(dirname ${soundState})
+
+          # Load some additional modules.
+          for mod in snd_pcm_oss; do
+              ${modprobe}/sbin/modprobe $mod || true
+          done
+
+          # Restore the sound state.
+          ${alsaUtils}/sbin/alsactl -f ${soundState} restore
+
+      end script
+
+      respawn sleep 1000000 # !!! hack
+
+      stop script
+
+          # Save the sound state.
+          ${alsaUtils}/sbin/alsactl -f ${soundState} store
+
+      end script
+    '';
+  };
+in
+
+{
+  require = [
+    (import ../upstart-jobs/default.nix) # config.services.extraJobs
+    # (import ../system/user.nix) # users.*
+    # (import ?) # config.environment.extraPackages
+    options
   ];
 
-  job = ''
-    start on udev
-    stop on shutdown
+  environment = {
+    extraPackages = ifEnable [alsaUtils];
+  };
 
-    start script
-
-        mkdir -m 0755 -p $(dirname ${soundState})
-
-        # Load some additional modules.
-        for mod in snd_pcm_oss; do
-            ${modprobe}/sbin/modprobe $mod || true
-        done
-
-        # Restore the sound state.
-        ${alsaUtils}/sbin/alsactl -f ${soundState} restore
-
-    end script
-
-    respawn sleep 1000000 # !!! hack
-
-    stop script
-
-        # Save the sound state.
-        ${alsaUtils}/sbin/alsactl -f ${soundState} store
-
-    end script
-  '';
+  users = {
+    extraGroups = ifEnable [group];
+  };
 
+  services = {
+    extraJobs = ifEnable [job];
+  };
 }
diff --git a/upstart-jobs/default.nix b/upstart-jobs/default.nix
index 490424b0c6d..fe1cad6195e 100644
--- a/upstart-jobs/default.nix
+++ b/upstart-jobs/default.nix
@@ -374,13 +374,6 @@ let
       inherit (config.services.bitlbee) portNumber interface;
     })
 
-  # ALSA sound support.
-  ++ optional config.sound.enable
-    (import ../upstart-jobs/alsa.nix {
-      inherit modprobe;
-      inherit (pkgs) alsaUtils;
-    })
-
   # Postfix mail server.
   ++ optional config.services.postfix.enable
     (import ../upstart-jobs/postfix.nix {