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From: Shane Ambler <FreeBSD@ShaneWare.Biz>
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To: Beeblebrox <zaphod@berentweb.com>
Subject: Re: starnge ports tree error: perl5.16 non-existent -- dependency
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On 15/03/2013 00:34, Beeblebrox wrote:
> Can someone tell me what's going on here? Perl gets installed twice then
> fails because it is not there?
> I have tested with enabling only one of below at-a-time in build-jail's
> make.conf, but no use.
> PERL_VERSION= 5.16  \  #PERL_DEFAULT_VERSION= 5.16  \  #PERL_PORT= perl5.16
>

PERL_PORT uses a two digit version - 5.16
PERL_VERSION should be a three digit version - 5.16.2

My guess is that your entry for PERL_VERSION is not getting updated by 
the perl install as it isn't a grep match.