diff -Naur dash-0.5.10.2/configure.ac dash-0.5.10.2.serenity/configure.ac
--- dash-0.5.10.2/configure.ac	2021-04-12 09:02:46.066529775 +0200
+++ dash-0.5.10.2.serenity/configure.ac	2021-04-12 09:01:46.232094315 +0200
@@ -181,5 +181,8 @@
 if test "$enable_lineno" != "no"; then
 	AC_DEFINE([WITH_LINENO], 1, [Define if you build with -DWITH_LINENO])
 fi
+AC_ARG_ENABLE(helpers, AS_HELP_STRING(--enable-helpers, \
+				     [Build helpers]))
+AM_CONDITIONAL([BUILD_HELPERS], [test x$enable_helpers = xyes])
 AC_CONFIG_FILES([Makefile src/Makefile])
 AC_OUTPUT
diff -Naur dash-0.5.10.2/src/Makefile.am dash-0.5.10.2.serenity/src/Makefile.am
--- dash-0.5.10.2/src/Makefile.am	2021-04-12 09:14:04.178912517 +0200
+++ dash-0.5.10.2.serenity/src/Makefile.am	2021-04-12 09:13:28.768298013 +0200
@@ -66,7 +66,9 @@
 signames.c: mksignames
 	./$^
 
+if BUILD_HELPERS
 mksyntax: token.h
 
 $(HELPERS): %: %.c
 	$(COMPILE_FOR_BUILD) -o $@ $<
+endif