Hi,

Even if i committed a little change to ja-ptex-share, the build will
still fail in building ghostscript.
This is due to the fact that ja-ptex will install teTeX2, while the
default tex to be installed is teTeX3.
One of the dependancies is ghostscript, and it uses our tex buildlink
framework, and thus will try to use the TEX_DEFAULT, which is teTeX3.

In order to build ja-ptex, you will still need to set 
TEX_DEFAULT=teTeX2 in /etc/mk.conf

Still looking forward for a better solution

Cheers,
antoine