Per an IRC conversation, if TCL is installed on but you uncheck the TCL option the epic port gets very confused. Please add the following line: TCL_CONFIGURE_OFF= --with-tcl=no
A commit references this bug: Author: misha Date: Fri Jul 17 15:16:20 UTC 2020 New revision: 542438 URL: https://svnweb.freebsd.org/changeset/ports/542438 Log: if TCL is installed on but you uncheck the TCL option the epic port gets confused. PR: 247995 Submitted by: jpaetzel Changes: head/irc/epic5/Makefile