--- src/gui/tcltk/Makefile.orig
+++ src/gui/tcltk/Makefile
@@ -116,7 +116,7 @@
 	$(Q)TCLVER=`./version.sh`; \
 	if [ -n "$$TCLVER" -a -f "$$TCLVER" -a -z "$$FORCE_REBUILD" ]; \
 	then	gunzip < "$$TCLVER" | tar -xf -; true; \
-	else	unset CC LD CCXTRA CFLAGS; \
+	else	 \
 		MAKEFLAGS=`echo "$$MAKEFLAGS" | sed 's/ -- .*//'`; \
 		$(MAKE) Q=$(Q) populate ; \
 		$(MAKE) Q=$(Q) bin/tclsh$(EXE) || exit 1; \
