anchor.diff:  
     sourceRoot = "${pname}-${version}/src";
   
  -  nativeBuildInputs = [ pkg-config ];
  +  nativeBuildInputs = [ pkg-config copyDesktopItems ];
   
     buildInputs = [
       cairo
  
positive.code:     zlib
    ];
  
    IPEPREFIX=placeholder "out";
    URWFONTDIR="${texlive}/texmf-dist/fonts/type1/urw/";
    LUA_PACKAGE = "lua";
  
    qtWrapperArgs = [ "--prefix PATH : ${texlive}/bin"  ];
  
    enableParallelBuilding = true;
  
    # TODO: make .desktop entry
  
    meta = with lib; {
      description = "An editor for drawing figures";
      homepage = "http://ipe.otfried.org";  # https not available
      license = licenses.gpl3Plus;
      longDescription = ''
        Ipe is an extensible drawing editor for creating figures in PDF and Postscript format.
  
negative.code: { lib
  , mkDerivation
  , makeDesktopItem
  , fetchurl
  , pkg-config
  , copyDesktopItems
  , cairo
  , freetype
  , ghostscript
  