anchor.diff:  
     configureFlags = [
       "--disable-maintainer-mode"
  -    "--enable-nls"
       "--${boolEn (gobject-introspection != null)}-introspection"
  -    "--disable-gtk-doc"
  -    "--disable-gtk-doc-html"
  -    "--disable-gtk-doc-pdf"
  -    "--${boolWt (zlib != null)}-zlib"
  -    "--${boolWt (bzip2 != null)}-bz2"
  -    "--${boolEn (gdk-pixbuf != null)}-gdk-pixbuf"
     ];
  -
  -  preCheck = "patchShebangs ./tests/";
  -
  -  doCheck = true;
   
     passthru = {
       srcVerification = fetchurl {
  +      failEarly = true;
         inherit (src)
           outputHash
           outputHashAlgo
           urls;
  -      sha256Url = "https://download.gnome.org/sources/libgsf/${channel}/"
  -        + "${name}.sha256sum";
  -      failEarly = true;
  +      fullOpts = {
  +        sha256Url = "https://download.gnome.org/sources/libgsf/${channel}/"
  +          + "${name}.sha256sum";
  +      };
       };
     };
   
  
positive.code:   nativeBuildInputs = [
      gettext
      intltool
    ] ++ optionals doCheck [
      perl
    ];
  
    buildInputs = [
  
negative.code:     glib
      gobject-introspection
      libxml2
      zlib
    ];
  
    preConfigure = ''
  