anchor.diff: -{ lib, stdenv, pkg-config, fetchFromGitHub, python3, vala_0_40
  +{ lib, stdenv, pkg-config, fetchFromGitHub, python3, vala
   , gtk3, libwnck, libxfce4util, xfce4-panel, wafHook, xfce }:
   
   stdenv.mkDerivation rec {
  
positive.code:     sha256 = "sha256-aKrJzf9rwCyXAJsRIXdBzmJBASuXD5I5kZrp+atx4FA=";
    };
  
    # Does not build with vala 0.48 or later
    # Upstream has no activity for a while
    # libxfce4panel-2.0.vapi:92.3-92.41: error: overriding method `Xfce.PanelPlugin.remote_event' is incompatible
    # with base method `bool Xfce.PanelPluginProvider.remote_event (string, GLib.Value, uint)': too few parameters.
    #               public virtual signal bool remote_event (string name, GLib.Value value);
    #               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    nativeBuildInputs = [ pkg-config vala_0_40 wafHook python3 ];
    buildInputs = [ gtk3 libwnck libxfce4util xfce4-panel ];
  
    postPatch = ''
  
negative.code:     license = licenses.mit;
      platforms = platforms.linux;
      maintainers = with maintainers; [ volth ] ++ teams.xfce.members;
      # Does not build with vala 0.48 or later
      # libxfce4panel-2.0.vapi:92.3-92.41: error: overriding method `Xfce.PanelPlugin.remote_event' is incompatible
      # with base method `bool Xfce.PanelPluginProvider.remote_event (string, GLib.Value, uint)': too few parameters.
      #               public virtual signal bool remote_event (string name, GLib.Value value);
      #               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      # Upstream has no activity since 20 May 2020
      broken = true;
    };
  }
  