final: prev: {
  signal-desktop = prev.signal-desktop.overrideAttrs (oldAttrs: rec {
    pname = "signal-desktop";
    dir = "Signal";
    version = "6.21.0";
    hash = "sha256-MDjh2slEmGCMn0Q4YsIzVQO2I7ZE5XUJX5qH4OYFFxw=";

    src = prev.fetchurl {
      url = "https://updates.signal.org/desktop/apt/pool/main/s/${pname}/${pname}_${version}_amd64.deb";
      inherit hash;
    };

    preFixup = ''
      gappsWrapperArgs+=(
        --prefix LD_LIBRARY_PATH : "${prev.lib.makeLibraryPath [prev.stdenv.cc.cc]}"
        --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations}}"
        --suffix PATH : ${prev.lib.makeBinPath [prev.xdg-utils]}
      )
      # Fix the desktop link
      substituteInPlace $out/share/applications/${pname}.desktop \
        --replace "/opt/${dir}/${pname}" $out/bin/${pname}
      autoPatchelf --no-recurse -- "$out/lib/${dir}/"
      patchelf --add-needed ${prev.libpulseaudio}/lib/libpulse.so "$out/lib/${dir}/resources/app.asar.unpacked/node_modules/@signalapp/ringrtc/build/linux/libringrtc-x64.node"
    '';
  });
}