Issue #10199: Moved Demo/turtle under Lib/
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 475d272..ffa1cb0 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -893,6 +893,7 @@
 		importlib/test/extension importlib/test/frozen \
 		importlib/test/import_ importlib/test/source \
 		setuptools setuptools/command setuptools/tests setuptools.egg-info \
+		turtledemo \
 		multiprocessing multiprocessing/dummy \
 		unittest unittest/test \
 		curses pydoc_data $(MACHDEPS)