diff --git a/pkgs/applications/networking/instant-messengers/kadu/default.nix b/pkgs/applications/networking/instant-messengers/kadu/default.nix
index be24878259fb..a74460c3e39b 100644
--- a/pkgs/applications/networking/instant-messengers/kadu/default.nix
+++ b/pkgs/applications/networking/instant-messengers/kadu/default.nix
@@ -15,6 +15,10 @@ stdenv.mkDerivation {
 
   configureFlags = "CPPFLAGS=-DQT_NO_DEBUG";
 
+  preConfigure = ''
+    export PKG_CONFIG_PATH="$PKG_CONFIG_PATH:${phonon}/lib64/pkgconfig:${phonon}/lib32/pkgconfig"
+  '';
+
   cmakeFlags = "-DENABLE_AUTODOWNLOAD=OFF -DBUILD_DESCRIPTION='NixOS' -DCMAKE_BUILD_TYPE=Release";
 
   prePatch = ''