--- mlton-20180207-orig/Makefile	2018-02-07 21:22:55.000000000 +1100
+++ mlton-20180207/Makefile	2018-02-28 11:28:00.639642560 +1100
@@ -137,18 +137,22 @@
 .PHONY: bootstrap-smlnj
 bootstrap-smlnj:
 	$(MAKE) smlnj-mlton
-	$(RM) "$(BIN)/mlton"
+	$(MV) "$(BIN)/mlton" "$(BIN)/mlton.mlton"
+	$(CP) "$(BIN)/mlton.smlnj" "$(BIN)/mlton"
 	$(MAKE) BOOTSTRAP_MLTON=mlton.smlnj all
 	smlnj_heap_suffix=`echo 'TextIO.output (TextIO.stdErr, SMLofNJ.SysInfo.getHeapSuffix ());' | sml 2>&1 1> /dev/null` && $(RM) "$(LIB)/mlton/mlton-smlnj.$$smlnj_heap_suffix"
 	$(RM) "$(BIN)/mlton.smlnj"
+	$(MV) "$(BIN)/mlton.mlton" "$(BIN)/mlton"
 
 .PHONY: bootstrap-polyml
 bootstrap-polyml:
 	$(MAKE) polyml-mlton
-	$(RM) "$(BIN)/mlton"
+	$(MV) "$(BIN)/mlton" "$(BIN)/mlton.mlton"
+	$(CP) "$(BIN)/mlton.polyml" "$(BIN)/mlton"
 	$(MAKE) BOOTSTRAP_MLTON=mlton.polyml all
 	$(RM) "$(LIB)/mlton-polyml$(EXE)"
 	$(RM) "$(BIN)/mlton.polyml"
+	$(MV) "$(BIN)/mlton.mlton" "$(BIN)/mlton"
 
 .PHONY: clean
 clean: