Great question — answering as the UphillTech team:
It looks like the perl5 package requires a newer version of the C library than the one your system is using. This is extremely unlikely to happen if Your system is up to date (no pending package updates) You're only using official FreeBSD package repositories, no third-party ones You don't have any custom third-party software installers on your system that might've chucked a copy of perl into /usr/lib/perl5 You installed perl5 and ack-grep through the official ports reopository How did you install ack-grep and perl? If you didn't install perl5 or ack-grep from the FreeBSD package repositories (ports), that's probably your issue. You could try recompiling perl5 from source code against your...
Full answer by allquixotic: https://superuser.stackexchange.com/a/1169811 (CC BY-SA 4.0).
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