I tried grabbing the latest justtex.zip and linuxtex.zip from 

http://www.pragma-ade.com/download-1.htm

and texexec --make --all is dying on:

-------
       assuming engine : mpost
This is MetaPost, Version 0.901 (Web2C 7.5.5) (INIMP)
(/home/sjansen/Downloads/test/tex/texmf-local/web2c/natural.tcx)
(/home/sjansen/Downloads/test/tex/texmf-local/metapost/context/base/metafun.mp
! I can't find file `plain.mp'.
l.27   input plain.mp
                      ; % John Hobby's file
Please type another input file name:
-------

I'm basically doing the following. I'm pretty sure it has worked in the
past. Is it not correct?

mkdir ­p $TEXDIR
unzip justtex.zip ­d $TEXDIR
unzip linuxtex.zip ­d $TEXDIR
chmod a+x $TEXDIR/tex/texmf­linux/bin/*
source $TEXDIR/tex/setuptex $TEXDIR/tex
cd /tmp ; texexec ­­make ­­all

-- 
Stuart Jansen <sjansen@gurulabs.com>
Guru Labs, L.C.