diff --git a/pkgs/desktops/kde-4.5/libs/default.nix b/pkgs/desktops/kde-4.5/libs/default.nix
index 05d37485aad6..216011fdc5f5 100644
--- a/pkgs/desktops/kde-4.5/libs/default.nix
+++ b/pkgs/desktops/kde-4.5/libs/default.nix
@@ -20,6 +20,8 @@ stdenv.mkDerivation rec {
     automoc4 strigi soprano qca2 attica
   ];
 
+  patches = [ ./python-site-packages-install-dir.diff ];
+
   propagatedBuildInputs = [ shared_desktop_ontologies stdenv.gcc.libc ];
 
   # cmake fails to find acl.h because of C++-style comment
diff --git a/pkgs/desktops/kde-4.5/libs/python-site-packages-install-dir.diff b/pkgs/desktops/kde-4.5/libs/python-site-packages-install-dir.diff
new file mode 100644
index 000000000000..05b280838c4d
--- /dev/null
+++ b/pkgs/desktops/kde-4.5/libs/python-site-packages-install-dir.diff
@@ -0,0 +1,13 @@
+Source: upstream r1153602
+Index: a/cmake/modules/SIPMacros.cmake
+===================================================================
+--- a/cmake/modules/SIPMacros.cmake	(revision 1153601)
++++ b/cmake/modules/SIPMacros.cmake	(revision 1153602)
+@@ -119,6 +119,6 @@
+     TARGET_LINK_LIBRARIES(${_logical_name} ${EXTRA_LINK_LIBRARIES})
+     SET_TARGET_PROPERTIES(${_logical_name} PROPERTIES PREFIX "" OUTPUT_NAME ${_child_module_name})
+ 
+-    INSTALL(TARGETS ${_logical_name} DESTINATION "${PYTHON_SITE_PACKAGES_DIR}/${_parent_module_path}")
++    INSTALL(TARGETS ${_logical_name} DESTINATION "${PYTHON_SITE_PACKAGES_INSTALL_DIR}/${_parent_module_path}")
+ 
+ ENDMACRO(ADD_SIP_PYTHON_MODULE)