It was broken since a57431955e.
a57431955e
@ -47,7 +47,7 @@ parser:
# tricky because the file is used when generating its own new version, which
# means we can't start writing the header there until we call $(PEGJS).
$(PEGJS) $(PARSER_SRC_FILE) $(PARSER_OUT_FILE_NEW)
$(PEGJS) -o $(PARSER_OUT_FILE_NEW) $(PARSER_SRC_FILE)
rm -f $(PARSER_OUT_FILE)