Problem with p5-Unicode-MapUTF8

[Roger Merritt]

I was trying to install a Unicode module, p5-Unicode-MapUTF8, and got the 
error message:

>===>  Building for p5-Unicode-String-2.06
>cp String.pm blib/lib/Unicode/String.pm
>cp lib/Unicode/CharName.pm blib/lib/Unicode/CharName.pm
>make: don't know how to make 
>/usr/libdata/perl/5.00503/mach/CORE/opnames.h. Stop
>*** Error code 2
>
>Stop in /usr/home/ports/converters/p5-Unicode-String.
>** Command failed [exit code 1]: /usr/bin/script -qa 
>/tmp/portinstall2836.1 make
>** Fix the problem and try again.
>** The following packages were not installed or upgraded (*:skipped / 
>!:failed)
>         ! converters/p5-MIME-Base64 (p5-MIME-Base64-2.20)       (unknown 
> build error)
>         ! converters/p5-Unicode-String (p5-Unicode-String-2.06) (unknown 
> build error)

so apparently I need to find a copy of opnames.h someplace. I've tried 
cvsup'ing a couple of times, even this morning, but the problem persists. 
Is there some further dependency I need to install first?

-- 
Roger