lilv: add pipewire test

pkgs/development/libraries/audio/lilv/default.nix

@@ -1,4 +1,8 @@
-{ lib, stdenv, fetchurl, lv2, pkg-config, python3, serd, sord, sratom, wafHook }:
+{ lib, stdenv, fetchurl, lv2, pkg-config, python3, serd, sord, sratom, wafHook
+
+# test derivations
+, pipewire
+}:
 
 stdenv.mkDerivation rec {
   pname = "lilv";
@@ -17,6 +21,10 @@ stdenv.mkDerivation rec {
   buildInputs = [ serd sord sratom ];
   propagatedBuildInputs = [ lv2 ];
 
+  passthru.tests = {
+    inherit pipewire;
+  };
+
   meta = with lib; {
     homepage = "http://drobilla.net/software/lilv";
     description = "A C library to make the use of LV2 plugins";