anchor.diff:  
     pyqt4 = callPackage ../development/python-modules/pyqt/4.x.nix { inherit (pkgs) pkgconfig; };
   
  -  pyqt5 = pkgs.libsForQt514.callPackage ../development/python-modules/pyqt/5.x.nix { pythonPackages = self; };
  +  pyqt5 = libsForQt5.callPackage ../development/python-modules/pyqt/5.x.nix { pythonPackages = self; };
   
     pyqt5_with_qtmultimedia = self.pyqt5.override { withMultimedia = true; };
   
  
positive.code: 
    qscintilla-qt4 = callPackage ../development/python-modules/qscintilla { };
  
    qscintilla-qt5 = pkgs.libsForQt5.callPackage ../development/python-modules/qscintilla-qt5 { pythonPackages = self; };
  
    qscintilla = self.qscintilla-qt4;
  
  
negative.code:   pooch = callPackage ../development/python-modules/pooch { };
  
    poppler-qt5 = callPackage ../development/python-modules/poppler-qt5 {
      inherit (qt5) qtbase;
      inherit (libsForQt5) poppler;
      inherit (pkgs) pkgconfig;
    };
  
  