diff --git a/m1/perf/Makefile b/m1/perf/Makefile
index 8c85070..8ab0ad1 100644
--- a/m1/perf/Makefile
+++ b/m1/perf/Makefile
@@ -5,7 +5,8 @@ M1SWLIB_DIR=$(M1)/milkymist/software/libfpvm
 
 #CFLAGS_EXTRA=-DCOMP_DEBUG
 CFLAGS_EXTRA=
-CFLAGS_COMMON=-Wall -g -pg $(CFLAGS_EXTRA)
+CFLAGS_PROF=-pg
+CFLAGS_COMMON=-Wall -g $(CFLAGS_PROF) $(CFLAGS_EXTRA)
 CFLAGS=$(CFLAGS_COMMON) \
        -I$(COMPILER_DIR) \
        -Ifakes -I$(M1SWINC_DIR)
@@ -17,7 +18,7 @@ COMPILER_O	= $(COMPILER_DIR)/compiler.o
 LIBFPVM_A	= $(M1SWLIB_DIR)/libfpvm.a
 OBJS		= main.o $(COMPILER_O)
 
-.PHONY:		all clean path
+.PHONY:		all clean spotless path
 
 all:		main
 
@@ -39,5 +40,8 @@ clean:
 		rm -f $(M1SWLIB_DIR)/sched.o
 		rm -f $(OBJS)
 
+spotless:	clean
+		rm -f main
+
 path:
 		@echo $(M1)
diff --git a/m1/perf/runs b/m1/perf/runs
index 9a544dd..ac626e0 100755
--- a/m1/perf/runs
+++ b/m1/perf/runs
@@ -49,7 +49,8 @@ fi
 
 $profile || extra="$extra -DCOMP_DEBUG"
 
-make CFLAGS_EXTRA="$extra" $sched clean all
+make spotless
+make CFLAGS_EXTRA="$extra" $sched all
 
 for n in $M1/flickernoise/patches/*/*.fnp; do
 	s=`sanitize "$n"`