anchor.diff:        # Make a symlink to the binary from bin.
         mkdir -p $out/bin/
         ln -s $out/lib/teamspeak/ts3client $out/bin/ts3client
  +
  +      wrapProgram $out/bin/ts3client \
  +        --set LD_PRELOAD "${libredirect}/lib/libredirect.so" \
  +        --set QT_PLUGIN_PATH "$out/lib/teamspeak/platforms" \
  +        --set NIX_REDIRECTS /usr/share/X11/xkb=${xkeyboard_config}/share/X11/xkb
       '';
   
     dontStrip = true;
  
positive.code: { stdenv, fetchurl, zlib, glib, libpng, freetype, xorg, fontconfig, alsaLib,
    qt4, pulseaudio ? null }:
  
  let
  
    version = "3.0.13.1";
  
    arch = if stdenv.is64bit then "amd64" else "x86";
   
  
negative.code: 
    deps =
      [ zlib glib libpng freetype xorg.libSM xorg.libICE xorg.libXrender
        xorg.libXrandr xorg.libXfixes xorg.libXcursor xorg.libXinerama xlibs.libxcb
        fontconfig xorg.libXext xorg.libX11 alsaLib qt5 pulseaudio quazip
      ];
  
    quazip = stdenv.mkDerivation {
      name = "quazip-0.7";
  
      src = fetchurl {
        url = "mirror://sourceforge/project/quazip/quazip/0.7/quazip-0.7.tar.gz";
        sha256 = "193lfvhcpqgl2jmxxa4q3asc4xh1mqp2j2l0h8lmm2zrpzwygxca";
      };
  
      buildInputs = [ qt4 ];
  
      preBuild = ''
        qmake PREFIX="$out"
      '';
    };
  
  in
  
  stdenv.mkDerivation rec {
    name = "teamspeak-client-${version}";
  
    version = "3.0.16";
  
    src = fetchurl {
      urls = [
        "http://dl.4players.de/ts/releases/${version}/TeamSpeak3-Client-linux_${arch}-${version}.run"
        "http://teamspeak.gameserver.gamed.de/ts3/releases/${version}/TeamSpeak3-Client-linux_${arch}-${version}.run"
        "http://files.teamspeak-services.com/releases/${version}/TeamSpeak3-Client-linux_${arch}-${version}.run"
      ];
      sha256 = if stdenv.is64bit 
                  then "0gvphrmrkyy1g2nprvdk7cvawznzlv4smw0mlvzd4b9mvynln0v2"
                  else "1b3nbvfpd8lx3dig8z5yk6zjkbmsy6y938dhj1f562wc8adixciz";
    };
  
    buildInputs = [ makeWrapper ];
  
    unpackPhase =
      ''
        yes | sh $src
        cd TeamSpeak*
      '';
  
  