diff --git a/pipelined/regression/Makefile b/pipelined/regression/Makefile
index 19531441b..610571691 100644
--- a/pipelined/regression/Makefile
+++ b/pipelined/regression/Makefile
@@ -27,7 +27,9 @@ make all:
 	# Build wally-riscv-arch-test
 	make -C ../../tests/wally-riscv-arch-test/ --jobs
 	make -C ../../tests/wally-riscv-arch-test/ XLEN=32  --jobs
-	make -f makefile wally-sim-files
+
+# build the memfiles and address files.
+	make -f makefile-memfile wally-sim-files --jobs
 	#cd ../../tests/wally-riscv-arch-test; elf2hex.sh
 	#cd ../../tests/wally-riscv-arch-test; extractFunctionRadix.sh work/*/*/*.elf.objdump
 	# ***extractFunctionRadix
diff --git a/pipelined/regression/makefile b/pipelined/regression/makefile-memfile
similarity index 67%
rename from pipelined/regression/makefile
rename to pipelined/regression/makefile-memfile
index ed0913f9d..030cf8d57 100644
--- a/pipelined/regression/makefile
+++ b/pipelined/regression/makefile-memfile
@@ -3,13 +3,7 @@ SUFFIX	:= work
 ARCHDIR	:= $(ROOT)/addins/riscv-arch-test
 WALLYDIR:= $(ROOT)/tests/wally-riscv-arch-test
 IMPERASDIR	:= $(ROOT)/tests/imperas-riscv-tests
-DIR1	:= $(ROOT)/addins/riscv-arch-test/$(SUFFIX)
-DIR2	:= $(ROOT)/tests/wally-riscv-arch-test/$(SUFFIX)
-DIR3	:= $(ROOT)/tests/imperas-riscv-tests/$(SUFFIX)
-ALLDIRS := $(DIR1) $(DIR2) $(DIR3)
-
-
-#ALLDIRS	:= .
+ALLDIRS := $(ARCHDIR)/$(SUFFIX) $(WALLYDIR)/$(SUFFIX) $(IMPERASDIR)/$(SUFFIX)
 
 ELFFILES	?= $(shell find $(ALLDIRS) -type f -regex ".*\.elf")
 MEMFILES ?= $(ELFFILES:.elf=.elf.memfile)
@@ -19,22 +13,12 @@ print:
 	echo "files in $(ALLDIRS) are $(ELFFILES)."
 	echo "memfiles are $(MEMFILES)"
 
-.PHONY: all
-#.NOTPARALLEL: all
-all: elfs wally-sim-files
+.PHONY: all wally-sim-files
+all: wally-sim-files
 
 wally-sim-files: $(MEMFILES) $(ADDRFILES)
 	echo "$@"
 
-.PHONY: elfs
-elfs:
-	make -C $(ARCHDIR) --jobs
-	make -C $(ARCHDIR) XLEN=32 --jobs
-	make -C $(WALLYDIR) --jobs
-	make -C $(WALLYDIR) XLEN=32 --jobs
-	make -C $(IMPERASDIR) --jobs
-	make -C $(IMPERASDIR) XLEN=64 --jobs
-
 # notes to self on how this works.
 # The find command locates all of the *.elf files in directory DIR1.  A list of .memfiles and
 # .addr files are generated from the .elf.  These are used as targets.
@@ -49,4 +33,5 @@ elfs:
 %.elf.objdump.addr: %.elf.objdump
 	extractFunctionRadix.sh $<
 
-#riscv64-unknown-elf-elf2hex --bit-width $(shell echo $* | head -c 4 | tail -c 2) --input $< --output $@
+.PHONY: clean
+clean: