Fixes #29261: merged fix from 3.5.

diff --cc Makefile.pre.in
index 48b5180b0742e44d2b97bd5a7e074d86a57a7b28,dc0a40e237d2f1ee4f884a9ee53aa935169a9566..93aae9124726bd56855d0f945f0799849e102b98
--- 1/Makefile.pre.in
--- 2/Makefile.pre.in
+++ b/Makefile.pre.in
@@@ -1244,9 -1226,9 +1244,9 @@@ LIBSUBDIRS=     tkinter tkinter/test tkinte
                turtledemo \
                multiprocessing multiprocessing/dummy \
                unittest unittest/test unittest/test/testmock \
-               venv venv/scripts venv/scripts/posix \
+               venv venv/scripts venv/scripts/common venv/scripts/posix \
 -              curses pydoc_data $(MACHDEPS)
 -libinstall:   build_all $(srcdir)/Lib/$(PLATDIR) $(srcdir)/Modules/xxmodule.c
 +              curses pydoc_data
 +libinstall:   build_all $(srcdir)/Modules/xxmodule.c
        @for i in $(SCRIPTDIR) $(LIBDEST); \
        do \
                if test ! -d $(DESTDIR)$$i; then \