diff --git a/vtk_sdk_python_wheel_helper/VTKSDKModuleSDK.cmake b/vtk_sdk_python_wheel_helper/VTKSDKModuleSDK.cmake
index 5609901..deaccda 100644
--- a/vtk_sdk_python_wheel_helper/VTKSDKModuleSDK.cmake
+++ b/vtk_sdk_python_wheel_helper/VTKSDKModuleSDK.cmake
@@ -88,7 +88,7 @@ function(vtksdk_install_modules_sdk package_name)
 
   set(VTKSDK_PACKAGE_NAME ${package_name})
   set(VTKSDK_PACKAGE_NAMESPACE ${package_namespace})
-  set(VTKSDK_EXTERNAL_PACKAGE_DEPENDS ${EXTERNAL_DEPENDENCIES})
+  set(VTKSDK_EXTERNAL_PACKAGE_DEPENDS ${arg_EXTERNAL_DEPENDENCIES})
   set(VTKSDK_EXTERNAL_PACKAGE_CMAKE_PREFIX ${arg_PREFIX_PATHS})
 
   set(VTKSDK_CMAKE_MODULES_INCLUDED)