[MLton] problems building mlton

[Lukasz S Ziarek]

I am reciving the following message when I try to build MLton on my lab
machine.

/home/lziarek/usr/bin/mlton @MLton  gc-summary -- -host self -verbose 1
-output mlton-compile mlton-stubs-1997.cm
MLton 20030716 (built Wed Jul 16 10:23:10 2003 on redhat71)
MLton starting
   Compile SML starting
      pre codegen starting
../lib/mlton-stubs/1997-to-2002.sml:8.9-11.3 Error: unify: type
constructors not equal
   t1: char vector
   t2: char vector option
../lib/mlyacc/parser2.sml:174.35-174.40 Error: unify: type constructors
not equal
   t1: char vector
   t2: <recur> option
../lib/mlyacc/parser2.sml:175.44-175.45 Error: unify: type constructors
not equal
.........


Any ideas what may be causing this? I have the scripts set to use a local
copy of MLton, the newest official binary release that I downloaded and
have in my home directory.

Luke