diff --git a/passes/techmap/Makefile.inc b/passes/techmap/Makefile.inc
index ae1ebbb56..b83ab8495 100644
--- a/passes/techmap/Makefile.inc
+++ b/passes/techmap/Makefile.inc
@@ -10,10 +10,12 @@ OBJS += passes/techmap/extract.o
 GENFILES += passes/techmap/stdcells.inc
 
 passes/techmap/stdcells.inc: techlibs/common/stdcells.v
-	echo "// autogenerated from $<" > $@.new
-	od -v -td1 -w1 $< | awk 'BEGIN { print "static char stdcells_code[] = {"; } $$2 != "" { print $$2 ","; } \
-			END { print 0 "};"; }' | fmt >> $@.new
-	mv $@.new $@
+	echo "// autogenerated from $<\n" > $@.new
+	echo "static char stdcells_code[] = {" >> $@.new
+	for c in `od -v -td1 -An $<` ; do echo " $$c," >> $@.new ; done
+	echo " 0 };" >> $@.new
+	fmt $@.new > $@
+	rm -f $@.new
 
 passes/techmap/techmap.o: passes/techmap/stdcells.inc