{ libXtst, cups, nspr, gconf, libXScrnSaver,
  gmime, alsaLib, libXinerama, mesa_glu, xorg,
  pangox_compat, gtkglext, libXi, libX11, libXext, libXt, electron,
  cairo, gdk_pixbuf, stdenv, dpkg, fetchurl,
  gtk2-x11, gtk3, glib, atk, freetype, dbus,
  gcc-unwrapped, nss, pango, fontconfig,
}:

stdenv.mkDerivation {

  name = "upwork";

  src = fetchurl {
    url = "https://updates-desktopapp.upwork.com/binaries/v4_2_153_0_tkzkho5lhz15j08q/upwork_amd64.deb";
    sha256 = "80cf1861494bd17529ee59fc29f9ec972af37548a9c70c6bf9ba3faf8216caa7";
  };

  src_nss_utils = fetchurl {
    url = "http://ftp.de.debian.org/debian/pool/main/n/nss/libnss3_3.26.2-1.1_amd64.deb";
    sha256 = "74556048294fd76e20d4368387fca565b0748ef57fb8ce53aafec0913ac623d2";
  };

  libPath = stdenv.lib.makeLibraryPath
    [ libXi libX11 libXext libXt electron
      fontconfig cairo gdk_pixbuf pango glib
      dbus gtk3 gtk2-x11 atk freetype
      gtkglext mesa_glu libXinerama libXScrnSaver
      nspr gconf gcc-unwrapped nss
      gmime alsaLib cups libXtst
    ];


  buildCommand = ''
    echo 'unpacking...'
    mkdir unpacked
    dpkg-deb -x $src unpacked
    dpkg-deb -x $src_nss_utils .

    cp -r unpacked/ $out/
    ls .
    mv usr/lib/x86_64-linux-gnu/libnssutil3.so $out/usr/share/upwork/
    strip --strip-unneeded $out/usr/share/upwork/libnssutil3.so


    echo $libPath:$out/usr/share/upwork
    echo 'patching...'
    patchelf \
      --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" \
      --set-rpath $libPath:$out/usr/share/upwork/ \
      $out/usr/share/upwork/upwork

  '';

  buildInputs = [ dpkg ];
}