diff --git a/update.py b/update.py
index c0c9092..79312b9 100644
--- a/update.py
+++ b/update.py
@@ -211,9 +211,9 @@ def gen_cmakelists(project_name, min_cmake_version, relative_path, modules):
     if len(modules) > 0:
         s.append('\n# directories which hold included cmake modules')
 
-    module_paths = set([module.path for module in modules])
-    module_paths = list(module_paths)
+    module_paths = [module.path for module in modules]
     module_paths.append('downloaded')  # this is done to be able to find fetched modules when testing
+    module_paths = list(set(module_paths))
     module_paths.sort()  # we do this to always get the same order and to minimize diffs
     for directory in module_paths:
         rel_cmake_module_path = os.path.join(relative_path, directory)