Fix tray icon context menu of Qt 5 apps on KDE (#501275)

pkgs/by-name/li/libdbusmenu-qt5/package.nix

@@ -0,0 +1,36 @@
+{
+  lib,
+  stdenv,
+  fetchgit,
+  cmake,
+  libsForQt5,
+}:
+
+stdenv.mkDerivation rec {
+  pname = "libdbusmenu-qt5";
+  version = "0.9.3+16";
+
+  src = fetchgit {
+    url = "https://git.launchpad.net/ubuntu/+source/libdbusmenu-qt";
+    rev = "import/${version}.04.20160218-1";
+    hash = "sha256-nXZv1m/dQv8vt+xPS7WTC8nKfbEJ45WtZ8vVBencPg0=";
+  };
+
+  buildInputs = [ libsForQt5.qtbase ];
+  nativeBuildInputs = [ cmake ];
+
+  cmakeFlags = [
+    "-DWITH_DOC=OFF"
+    "-DCMAKE_POLICY_VERSION_MINIMUM=3.5"
+  ];
+
+  dontWrapQtApps = true;
+
+  meta = {
+    homepage = "https://launchpad.net/libdbusmenu-qt";
+    description = "Provides a Qt implementation of the DBusMenu spec";
+    maintainers = [ lib.maintainers.ttuegel ];
+    inherit (libsForQt5.qtbase.meta) platforms;
+    license = lib.licenses.lgpl2;
+  };
+}

pkgs/development/libraries/kde-frameworks/knotifications.nix

@@ -11,6 +11,7 @@
   qttools,
   qtx11extras,
   qtmacextras,
+  libdbusmenu-qt5,
 }:
 
 mkDerivation {
@@ -26,6 +27,7 @@ mkDerivation {
     kwindowsystem
     phonon
     qtx11extras
+    libdbusmenu-qt5
   ]
   ++ lib.optionals stdenv.hostPlatform.isDarwin [
     qtmacextras