anchor.diff:  
   in stdenv.mkDerivation rec {
     pname = "palemoon";
  -  version = "28.10.0";
  +  version = "28.12.0";
   
  -  src = fetchgit {
  -    url = "https://github.com/MoonchildProductions/Pale-Moon.git";
  +  src = fetchFromGitHub {
  +    owner = "MoonchildProductions";
  +    repo = "Pale-Moon";
       rev = "${version}_Release";
  -    sha256 = "0c64vmrp46sbl1dgl9dq2vkmpgz9gvgd59dk02jqwyhx4lln1g2l";
  +    sha256 = "1cc75972nhmxkkynkky1m2fijbf3qlzvpxsd98mxlx0b7h4d3l5l";
       fetchSubmodules = true;
     };
   
  -  desktopItem = makeDesktopItem {
  -    name = "palemoon";
  -    exec = "palemoon %U";
  -    icon = "palemoon";
  -    desktopName = "Pale Moon";
  -    genericName = "Web Browser";
  -    categories = "Network;WebBrowser;";
  -    mimeType = lib.concatStringsSep ";" [
  -      "text/html"
  -      "text/xml"
  -      "application/xhtml+xml"
  -      "application/vnd.mozilla.xul+xml"
  -      "x-scheme-handler/http"
  -      "x-scheme-handler/https"
  -      "x-scheme-handler/ftp"
  -    ];
  -  };
  +  passthru.updateScript = writeScript "update-${pname}" ''
  +    #!/usr/bin/env nix-shell
  +    #!nix-shell -i bash -p common-updater-scripts curl libxml2
  +
  +    set -eu -o pipefail
  +
  +    # Only release note announcement == finalized release
  +    version="$(
  +      curl -s 'http://www.palemoon.org/releasenotes.shtml' |
  +      xmllint --html --xpath 'html/body/table/tbody/tr/td/h3/text()' - 2>/dev/null | head -n1 |
  +      sed 's/v\(\S*\).*/\1/'
  +    )"
  +    update-source-version ${pname} "$version"
  +  '';
   
     nativeBuildInputs = [
  -    file gnum4 makeWrapper perl pkgconfig python2 wget which
  +    desktop-file-utils file gnum4 makeWrapper perl pkgconfig python2 wget which
     ];
   
     buildInputs = [
  
positive.code: 
      ac_add_options --prefix=$out
  
      mk_add_options MOZ_MAKE_FLAGS="-j$NIX_BUILD_CORES"
      mk_add_options AUTOCONF=${autoconf213}/bin/autoconf
      '
    '';
  
negative.code:   installPhase = ''
      $src/mach install
  
      desktop-file-install --dir=$out/share/applications \
        $src/palemoon/branding/official/palemoon.desktop
  
      for iconname in default{16,22,24,32,48,256} mozicon128; do
        n=''${iconname//[^0-9]/}
        size=$n"x"$n
        install -Dm644 $src/palemoon/branding/official/$iconname.png $out/share/icons/hicolor/$size/apps/palemoon.png
      done
  
      wrapProgram $out/lib/palemoon-${version}/palemoon \
  