{fetchurl, stdenv, dpkg, makeWrapper,
 alsaLib, cups, curl, dbus, expat, fontconfig, freetype, glib, gst_all_1, harfbuzz, libcap,
 libpulseaudio, libxml2, libxslt, libGLU, libGL, nspr, nss, openssl, systemd, wayland, xorg, zlib, ...
}:

stdenv.mkDerivation {
  pname = "viber";
  version = "7.0.0.1035";

  src = fetchurl {
    url = "https://download.cdn.viber.com/cdn/desktop/Linux/viber.deb";
    sha256 = "06mp2wvqx4y6rd5gs2mh442qcykjrrvwnkhlpx0lara331i2p0lj";
  };

  buildInputs = [ dpkg makeWrapper ];

  dontUnpack = true;

  libPath = stdenv.lib.makeLibraryPath [
      alsaLib
      cups
      curl
      dbus
      expat
      fontconfig
      freetype
      glib
      gst_all_1.gst-plugins-base
      gst_all_1.gstreamer
      harfbuzz
      libcap
      libpulseaudio
      libxml2
      libxslt
      libGLU libGL
      nspr
      nss
      openssl
      stdenv.cc.cc
      systemd
      wayland
      zlib

      xorg.libICE
      xorg.libSM
      xorg.libX11
      xorg.libxcb
      xorg.libXcomposite
      xorg.libXcursor
      xorg.libXdamage
      xorg.libXext
      xorg.libXfixes
      xorg.libXi
      xorg.libXrandr
      xorg.libXrender
      xorg.libXScrnSaver
      xorg.libXtst
      xorg.xcbutilimage
      xorg.xcbutilkeysyms
      xorg.xcbutilrenderutil
      xorg.xcbutilwm
  ]
  ;

  installPhase = ''
    dpkg-deb -x $src $out
    mkdir -p $out/bin

    # Soothe nix-build "suspicions"
    chmod -R g-w $out

    for file in $(find $out -type f \( -perm /0111 -o -name \*.so\* \) ); do
      patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" "$file" || true
      patchelf --set-rpath $libPath:$out/opt/viber/lib $file || true
    done

    # qt.conf is not working, so override everything using environment variables
    wrapProgram $out/opt/viber/Viber \
      --set QT_PLUGIN_PATH "$out/opt/viber/plugins" \
      --set QT_XKB_CONFIG_ROOT "${xorg.xkeyboardconfig}/share/X11/xkb" \
      --set QTCOMPOSE "${xorg.libX11.out}/share/X11/locale"
    ln -s $out/opt/viber/Viber $out/bin/viber

    mv $out/usr/share $out/share
    rm -rf $out/usr

    # Fix the desktop link
    substituteInPlace $out/share/applications/viber.desktop \
      --replace /opt/viber/Viber $out/opt/viber/Viber \
      --replace /usr/share/ $out/share/
  '';

  dontStrip = true;
  dontPatchELF = true;

  meta = {
    homepage = "http://www.viber.com";
    description = "An instant messaging and Voice over IP (VoIP) app";
    license = stdenv.lib.licenses.unfree;
    platforms = [ "x86_64-linux" ];
    maintainers = with stdenv.lib.maintainers; [ jagajaga ];
  };

}