Created attachment 169237 [details] patch
Aha, MASTER_SITE_SUBDIR did the trick. Thanks! And I found a missing dep.
A commit references this bug: Author: pi Date: Tue Apr 12 12:20:44 UTC 2016 New revision: 413112 URL: https://svnweb.freebsd.org/changeset/ports/413112 Log: security/p5-Protocol-ACME: change DISTSITE from github to CPAN, add dependency PR: 208741 Submitted by: mat Changes: head/security/p5-Protocol-ACME/Makefile head/security/p5-Protocol-ACME/distinfo
Committed, thanks!