anchor.diff:    meta = with lib; {
       description = "Practical and minimal image viewer";
       homepage = "https://interversehq.com/qview/";
  -    license = licenses.gpl3;
  +    license = licenses.gpl3Plus;
       maintainers = with maintainers; [ acowley ];
       platforms = platforms.all;
     };
  
positive.code: 
    buildInputs = [
      qtbase
    ];
  
    patchPhase = ''
  
negative.code: { lib
  , mkDerivation
  , fetchFromGitHub
  , qmake
  , qtbase
  , qtimageformats
  , qtsvg
  }:
  
  mkDerivation rec {
    pname = "qview";
  