anchor.diff:  
     ovh = callPackage ../development/python-modules/ovh { };
   
  -  ovito = toPythonModule (pkgs.libsForQt5.callPackage ../development/python-modules/ovito { pythonPackages = self; });
  +  ovito = toPythonModule (libsForQt5.callPackage ../development/python-modules/ovito { pythonPackages = self; });
   
     owslib = callPackage ../development/python-modules/owslib { };
   
  
positive.code: 
    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_with_qtmultimedia = self.pyqt5.override { withMultimedia = true; };
  
  
negative.code: 
    qscintilla-qt4 = callPackage ../development/python-modules/qscintilla { };
  
    qscintilla-qt5 = libsForQt5.callPackage ../development/python-modules/qscintilla-qt5 { pythonPackages = self; };
  
    qscintilla = self.qscintilla-qt4;
  
  