use $(RUNSHARED) to run plat-mac/regen
diff --git a/Makefile.pre.in b/Makefile.pre.in
index d98df71..4377afb 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -899,7 +899,7 @@
export PYTHONPATH; PYTHONPATH="`pwd`/Lib"; \
export DYLD_FRAMEWORK_PATH; DYLD_FRAMEWORK_PATH="`pwd`"; \
export EXE; EXE="$(BUILDEXE)"; \
- cd $(srcdir)/Lib/$(PLATDIR); ./regen
+ cd $(srcdir)/Lib/$(PLATDIR); $(RUNSHARED) ./regen
# Install the include files
INCLDIRSTOMAKE=$(INCLUDEDIR) $(CONFINCLUDEDIR) $(INCLUDEPY) $(CONFINCLUDEPY)