anchor.diff:  
       postUnpack = "sourceRoot=\${sourceRoot}/ETL/";
   
  -    buildInputs = [ autoreconfHook ];
  +    nativeBuildInputs = [ autoreconfHook ];
     };
   
     synfig = stdenv.mkDerivation rec {
  
positive.code:       "--with-boost-libdir=${boost.out}/lib"
      ];
  
      buildInputs = [
        ETL boost cairo gettext glibmm mlt-qt5 libsigcxx libxmlxx pango
        pkgconfig autoreconfHook
      ];
    };
  in
  
negative.code: 
    preConfigure = "./bootstrap.sh";
  
    nativeBuildInputs = [ pkgconfig autoreconfHook gettext ];
    buildInputs = [
      ETL boost cairo glibmm gtk3 gtkmm3 imagemagick intltool
      libjack2 libsigcxx libxmlxx makeWrapper mlt-qt5
      synfig which defaultIconTheme
    ];
  
    postInstall = ''
  