workrave: fix alert sounds by including the right GST plugins

pkgs/applications/misc/workrave/default.nix

···
 , autoconf, autoconf-archive, automake, gettext, intltool, libtool, pkgconfig
 , libICE, libSM, libXScrnSaver, libXtst, cheetah
 , gobjectIntrospection, glib, glibmm, gtkmm3, atk, pango, pangomm, cairo
-, cairomm , dbus, dbus-glib, gdome2, gstreamer, libsigcxx }:
+, cairomm , dbus, dbus-glib, gdome2, gstreamer, gst-plugins-base
+, gst-plugins-good, libsigcxx }:
 
 stdenv.mkDerivation rec {
   name = "workrave-${version}";
···
   buildInputs = [
     libICE libSM libXScrnSaver libXtst cheetah
     gobjectIntrospection glib glibmm gtkmm3 atk pango pangomm cairo cairomm
-    dbus dbus-glib gdome2 gstreamer libsigcxx
+    dbus dbus-glib gdome2 gstreamer gst-plugins-base gst-plugins-good libsigcxx
   ];
 
   preConfigure = "./autogen.sh";

pkgs/top-level/all-packages.nix

···
 
   workrave = callPackage ../applications/misc/workrave {
     inherit (python27Packages) cheetah;
+    inherit (gst_all_1) gstreamer gst-plugins-base gst-plugins-good;
   };
 
   worldengine-cli = python3Packages.worldengine;