diff --git a/pkgs/misc/themes/qtcurve/default.nix b/pkgs/misc/themes/qtcurve/default.nix
index 54715c01a9e..348b4ae4eb9 100644
--- a/pkgs/misc/themes/qtcurve/default.nix
+++ b/pkgs/misc/themes/qtcurve/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, cmake, extra-cmake-modules, pkgconfig
+{ stdenv, fetchurl, cmake, extra-cmake-modules, pkgconfig, mkDerivation
 , gtk2, qtbase, qtsvg, qtx11extras # Toolkit dependencies
 , karchive, kconfig, kconfigwidgets, kio, frameworkintegration
 , kguiaddons, ki18n, kwindowsystem, kdelibs4support, kiconthemes
@@ -7,7 +7,7 @@
 
 let
   version = "1.9";
-in stdenv.mkDerivation {
+in mkDerivation {
   name = "qtcurve-${version}";
   src = fetchurl {
     url = "http://download.kde.org/stable/qtcurve/qtcurve-${version}.tar.xz";