anchor.diff:  
     kdeApps_14_12 = recurseIntoAttrs (callPackage ../applications/kde-apps-14.12 {
       kf5 = kf57;
  -    qt5 = qt54;
       kde4 = kde4.override { inherit (kdeApps_14_12) kdelibs; };
     });
     kdeApps_stable = kdeApps_14_12;
  
positive.code:   numix-gtk-theme = callPackage ../misc/themes/gtk3/numix-gtk-theme { };
  
    plasma52 = recurseIntoAttrs (callPackage ../desktops/plasma-5.2 {
      qt5 = qt54;
      kf5 = kf57;
    });
    plasma5_latest = plasma52;
  
negative.code:     client = false;
      withKDE = false;
      useQt5 = true;
      qt = qt5;
      dconf = gnome3.dconf;
      tag = "-qt5";
    };
  