anchor.diff:      pulseaudio_lib
     ];
   
  +  postPatch = /* Use an icon that is supported in adwaita */ ''
  +    sed -i src/pavucontrol.glade \
  +      -e 's/stock_lock/insert-link-symbolic/'
  +  '';
  +
     configureFlags = [
  -    (enFlag "gtk3" (gtkmm_3 != null) null)
  +    "--${boolEn (gtkmm_3 != null)}-gtk3"
       "--disable-lynx"
       "--enable-nls"
  -  ];
  -
  -  NIX_CFLAGS_COMPILE = [
  -    "-std=c++11"
     ];
   
     preFixup = ''
  
positive.code: 
  let
    inherit (stdenv.lib)
      enFlag;
  in
  
  stdenv.mkDerivation rec {
    name = "pavucontrol-3.0";
  
    src = fetchurl {
      url = "http://freedesktop.org/software/pulseaudio/pavucontrol/${name}.tar.xz";
      sha256 = "14486c6lmmirkhscbfygz114f6yzf97h35n3h3pdr27w4mdfmlmk";
    };
  
  
negative.code: 
    meta = with stdenv.lib; {
      description = "PulseAudio Volume Control";
      homepage = https://freedesktop.org/software/pulseaudio/pavucontrol/ ;
      license = licenses.gpl2Plus;
      maintainers = with maintainers; [
        codyopel
  