Fixes issue 10120 (concurrent.futures module is not installed properly), patch by...

diff --git a/Makefile.pre.in b/Makefile.pre.in
index b66313be4f0f523bbe5b29be42b3da15770e29c6..475d272851ef593e8e263e68d995c405f9ec968d 100644 (file)
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -880,7 +880,7 @@ LIBSUBDIRS= tkinter tkinter/test tkinter/test/test_tkinter \
                 tkinter/test/test_ttk site-packages test \
                test/decimaltestdata test/xmltestdata \
                test/tracedmodules test/encoded_modules \
-               concurrent encodings \
+               concurrent concurrent/futures encodings \
                email email/mime email/test email/test/data \
                html json json/tests http dbm xmlrpc \
                sqlite3 sqlite3/test \