This port will be removed on 2020-12-31 if not fixed
Thanks for reporting this, Steve. 1.2.0 was from 2014. Fixed by updating the port to the latest revision.
A commit references this bug: Author: yuri Date: Thu Sep 24 16:37:25 UTC 2020 New revision: 549929 URL: https://svnweb.freebsd.org/changeset/ports/549929 Log: audio/lvtk: Update 1.2.0 -> 2.0.0rc1-14 PR: 249583 Reported by: swills Changes: head/audio/lvtk/Makefile head/audio/lvtk/distinfo head/audio/lvtk/pkg-plist