“The dialog implementation was the last piece of GNU GPL licensed software in FreeBSD’s base system. The FreeBSD installer previously transitioned to using bsddialog in place of dialog and then dpv was the last user of dialog but itself since turned off and now retired.”
https://github.com/freebsd/freebsd-src/commit/134a4c78d070f8c4ea43a060a7ae28d22ac39558
/root 