diff --git a/pkgs/desktops/kde-4.5/kde-package/default.nix b/pkgs/desktops/kde-4.5/kde-package/default.nix
index fbeb46cbcc5..81a36fe9502 100644
--- a/pkgs/desktops/kde-4.5/kde-package/default.nix
+++ b/pkgs/desktops/kde-4.5/kde-package/default.nix
@@ -19,6 +19,8 @@ rec {
             ).sha256;
         };
 
+        enableParallelBuilding = true;
+
         meta = {
           maintainers = with stdenv.lib.maintainers; [ sander urkud ];
           platforms = stdenv.lib.platforms.linux;