qt4: Don't pass top-level attribute through kde4

pkgs/applications/audio/jackmix/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgs, jack ? pkgs.libjack2 }:
+{ stdenv, fetchurl, pkgconfig, scons, qt4, lash, libjack2, jack ? libjack2 }:
 
 stdenv.mkDerivation rec {
   name = "jackmix-0.5.2";
@@ -8,10 +8,10 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [
-    pkgs.pkgconfig
-    pkgs.scons
-    pkgs.kde4.qt4
-    pkgs.lash
+    pkgconfig
+    scons
+    qt4
+    lash
     jack
   ];
 

pkgs/applications/science/robotics/gazebo/default.nix

@@ -5,7 +5,7 @@
   , pythonPackages, utillinux
 
   # these deps are hidden; cmake doesn't catch them
-  , gazeboSimulator, sdformat ? gazeboSimulator.sdformat, curl, tinyxml, kde4, x11
+  , gazeboSimulator, sdformat ? gazeboSimulator.sdformat, curl, tinyxml, qt4, x11
   , withIgnitionTransport ? true
   , libav, withLibAvSupport ? true
   , openal, withAudioSupport ? false
@@ -57,7 +57,7 @@ stdenv.mkDerivation rec {
     curl
     tinyxml
     x11
-    kde4.qt4
+    qt4
   ] ++ optional stdenv.isLinux utillinux # on Linux needs uuid/uuid.h
     ++ optional withDocs doxygen
     ++ optional withLibAvSupport libav  #TODO: package rubygem-ronn and put it here

pkgs/desktops/kde-4.14/default.nix

@@ -29,8 +29,6 @@ kde.modules // kde.individual //
 
   akonadi = callPackage ./support/akonadi { };
 
-  qt4 = qt48;
-
   inherit release;
 
   l10n = callPackage ./l10n {

pkgs/top-level/all-packages.nix

@@ -9242,7 +9242,7 @@ with pkgs;
     libpng = libpng12;
   };
 
-  qt4 = pkgs.kde4.qt4;
+  qt4 = qt48;
 
   qt48 = callPackage ../development/libraries/qt-4.x/4.8 {
     # GNOME dependencies are not used unless gtkStyle == true