anchor.diff:  
   stdenv.mkDerivation rec {
     name = "eog-${version}";
  -  versionMajor = "3.18";
  -  versionMinor = "2";
  +  versionMajor = "3.20";
  +  versionMinor = "0";
     version = "${versionMajor}.${versionMinor}";
   
     src = fetchurl {
       url = "mirror://gnome/sources/eog/${versionMajor}/${name}.tar.xz";
  -    sha256 = "0dp6kxs4yl8sd0l6qbr874pdzi4rfmp5izk169q15bacfpiicbfw";
  +    sha256 = "db715c172443c670dd959d1e6170a403018ed71b77dfd8732ac665a3b53e7e2b";
     };
   
     nativeBuildInputs = [
  
positive.code: 
  with {
    inherit (stdenv.lib)
      wtFlag;
  };
  
  
negative.code:     "--disable-gtk-doc-html"
      "--disable-gtk-doc-pdf"
      "--enable-nls"
      (enFlag "introspection" (gobject-introspection != null) null)
      "--enable-schemas-compile"
      "--disable-installed-tests"
      (wtFlag "libexif" (libexif != null) null)
  