diff --git a/nixos/modules/services/x11/desktop-managers/default.nix b/nixos/modules/services/x11/desktop-managers/default.nix
index 43e04a3076c..ebdb2ad0649 100644
--- a/nixos/modules/services/x11/desktop-managers/default.nix
+++ b/nixos/modules/services/x11/desktop-managers/default.nix
@@ -18,7 +18,7 @@ in
   # determines the default: later modules (if enabled) are preferred.
   # E.g., if KDE is enabled, it supersedes xterm.
   imports = [
-    ./none.nix ./xterm.nix ./xfce.nix ./kde4.nix ./kde4_next.nix
+    ./none.nix ./xterm.nix ./xfce.nix ./kde4.nix
     ./e17.nix ./e18.nix ./e19.nix ./gnome3.nix ./xbmc.nix
   ];
 
diff --git a/nixos/modules/services/x11/desktop-managers/kde4.nix b/nixos/modules/services/x11/desktop-managers/kde4.nix
index 669ddbd904f..0af84955780 100644
--- a/nixos/modules/services/x11/desktop-managers/kde4.nix
+++ b/nixos/modules/services/x11/desktop-managers/kde4.nix
@@ -146,8 +146,10 @@ in
           pkgs.strigi # used by nepomuk
           pkgs.mysql # used by akonadi
         ]
-      ++ [ nepomukConfig ] ++ phononBackendPackages
-      ++ config.environment.kdePackages;
+      ++ lib.optional config.hardware.pulseaudio.enable pkgs.kde4.kmix  # Perhaps this should always be enabled
+      ++ lib.optional config.hardware.bluetooth.enable pkgs.kde4.bluedevil
+      ++ lib.optional config.networking.networkmanager.enable pkgs.kde4.networkmanagement
+      ++ [ nepomukConfig ] ++ phononBackendPackages;
 
     environment.pathsToLink = [ "/share" ];
 
diff --git a/nixos/modules/services/x11/desktop-managers/kde4_next.nix b/nixos/modules/services/x11/desktop-managers/kde4_next.nix
deleted file mode 100644
index 568094358ba..00000000000
--- a/nixos/modules/services/x11/desktop-managers/kde4_next.nix
+++ /dev/null
@@ -1,163 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-let
-
-  xcfg = config.services.xserver;
-  cfg = xcfg.desktopManager.kde4_next;
-  xorg = pkgs.xorg;
-  kde = pkgs.kde4_next;
-
-  # Disable Nepomuk and Strigi by default.  As of KDE 4.7, they don't
-  # really work very well (e.g. searching files often fails to find
-  # files), segfault sometimes and consume significant resources.
-  # They can be re-enabled in the KDE System Settings under "Desktop
-  # Search".
-  nepomukConfig = pkgs.writeTextFile
-    { name = "nepomuk-config";
-      destination = "/share/config/nepomukserverrc";
-      text =
-        ''
-          [Basic Settings]
-          Start Nepomuk=false
-
-          [Service-nepomukstrigiservice]
-          autostart=false
-        '';
-    };
-
-  phononBackends = {
-    gstreamer = [
-      pkgs.phonon_backend_gstreamer
-      pkgs.gst_all.gstPluginsBase
-      pkgs.gst_all.gstPluginsGood
-      pkgs.gst_all.gstPluginsUgly
-      pkgs.gst_all.gstPluginsBad
-      pkgs.gst_all.gstFfmpeg # for mp3 playback
-      pkgs.gst_all.gstreamer # needed?
-    ];
-
-    vlc = [pkgs.phonon_backend_vlc];
-  };
-
-  phononBackendPackages = flip concatMap cfg.phononBackends
-    (name: attrByPath [name] (throw "unknown phonon backend `${name}'") phononBackends);
-
-in
-
-{
-  options = {
-
-    services.xserver.desktopManager.kde4_next = {
-      enable = mkOption {
-        type = types.bool;
-        default = false;
-        description = "Enable the KDE 4 desktop environment.";
-      };
-
-      phononBackends = mkOption {
-        type = types.listOf types.str;
-        default = ["gstreamer"];
-        example = ["gstreamer" "vlc"];
-        description = "Which phonon multimedia backend kde should use";
-      };
-    };
-
-  };
-
-
-  config = mkIf (xcfg.enable && cfg.enable) {
-
-    # If KDE 4 is enabled, make it the default desktop manager (unless
-    # overridden by the user's configuration).
-    # !!! doesn't work yet ("Multiple definitions. Only one is allowed
-    # for this option.")
-    # services.xserver.desktopManager.default = mkOverride 900 "kde4";
-
-    services.xserver.desktopManager.session = singleton
-      { name = "kde4_next";
-        bgSupport = true;
-        start =
-          ''
-            # The KDE icon cache is supposed to update itself
-            # automatically, but it uses the timestamp on the icon
-            # theme directory as a trigger.  Since in Nix the
-            # timestamp is always the same, this doesn't work.  So as
-            # a workaround, nuke the icon cache on login.  This isn't
-            # perfect, since it may require logging out after
-            # installing new applications to update the cache.
-            # See http://lists-archives.org/kde-devel/26175-what-when-will-icon-cache-refresh.html
-            rm -fv $HOME/.kde/cache-*/icon-cache.kcache
-
-            # Qt writes a weird ‘libraryPath’ line to
-            # ~/.config/Trolltech.conf that causes the KDE plugin
-            # paths of previous KDE invocations to be searched.
-            # Obviously using mismatching KDE libraries is potentially
-            # disastrous, so here we nuke references to the Nix store
-            # in Trolltech.conf.  A better solution would be to stop
-            # Qt from doing this wackiness in the first place.
-            if [ -e $HOME/.config/Trolltech.conf ]; then
-                sed -e '/nix\\store\|nix\/store/ d' -i $HOME/.config/Trolltech.conf
-            fi
-
-            # Start KDE.
-            exec ${kde.kdebase_workspace}/bin/startkde
-          '';
-      };
-
-    security.setuidOwners = singleton
-      { program = "kcheckpass";
-        source = "${kde.kdebase_workspace}/lib/kde4/libexec/kcheckpass";
-        owner = "root";
-        group = "root";
-        setuid = true;
-      };
-
-    environment.systemPackages =
-        [ kde.kdelibs
-
-          kde.kde_baseapps # Splitted kdebase
-          kde.kde_workspace
-          kde.kde_runtime
-          kde.konsole
-          kde.kate
-
-          kde.kde_wallpapers # contains kdm's default background
-          kde.oxygen_icons
-          pkgs.virtuoso # to enable Nepomuk to find Virtuoso
-
-          # Starts KDE's Polkit authentication agent.
-          kde.polkit_kde_agent
-
-          # Miscellaneous runtime dependencies.
-          kde.qt4 # needed for qdbus
-          pkgs.shared_mime_info
-          xorg.xmessage # so that startkde can show error messages
-          xorg.xset # used by startkde, non-essential
-          xorg.xauth # used by kdesu
-          pkgs.shared_desktop_ontologies # used by nepomuk
-          pkgs.strigi # used by nepomuk
-          pkgs.mysql # used by akonadi
-        ]
-      ++ lib.optional config.hardware.pulseaudio.enable kde.kmix  # Perhaps this should always be enabled
-      ++ lib.optional config.hardware.bluetooth.enable kde.bluedevil
-      ++ lib.optional config.networking.networkmanager.enable kde.networkmanagement
-      ++ [ nepomukConfig ] ++ phononBackendPackages;
-
-    environment.pathsToLink = [ "/share" ];
-
-    environment.etc = singleton
-      { source = "${pkgs.xkeyboard_config}/etc/X11/xkb";
-        target = "X11/xkb";
-      };
-
-    # Enable helpful DBus services.
-    services.udisks2.enable = true;
-    services.upower.enable = config.powerManagement.enable;
-
-    security.pam.services.kde = { allowNullPassword = true; };
-
-  };
-
-}