Always set SVNVERSION to "exported" if it otherwise fails.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index 3d08837..1cc43e6 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -438,7 +438,7 @@
$(SIGNAL_OBJS) \
$(MODOBJS) \
$(srcdir)/Modules/getbuildinfo.c
- $(CC) -c $(PY_CFLAGS) -DSVNVERSION=\"`LANG=C $(SVNVERSION) $(srcdir)`\" -o $@ $(srcdir)/Modules/getbuildinfo.c
+ $(CC) -c $(PY_CFLAGS) -DSVNVERSION=\"`LANG=C $(SVNVERSION)`\" -o $@ $(srcdir)/Modules/getbuildinfo.c
Modules/getpath.o: $(srcdir)/Modules/getpath.c Makefile
$(CC) -c $(PY_CFLAGS) -DPYTHONPATH='"$(PYTHONPATH)"' \