https://bugs.gentoo.org/705500
https://github.com/erlang/otp/pull/2508

--- a/lib/asn1/src/Makefile
+++ b/lib/asn1/src/Makefile
@@ -190,7 +190,8 @@ asn1rtt_%.$(EMULATOR): asn1rtt_%.erl
 	$(V_ERLC) +debug_info $<
 
 $(EVAL_CT_MODULES:%=%.erl): prepare_templates.$(EMULATOR) \
-			    $(EBIN)/asn1ct_rtt.$(EMULATOR)
+			    $(EBIN)/asn1ct_rtt.$(EMULATOR) \
+			    $(EBIN)/asn1ct_func.$(EMULATOR)
 
 #
 # Dependencies