Programs failing on Computer Language Shootout

Any idea what's stopping the compile on this simple program?

http://shootout.alioth.debian.org/sandbox/benchmark.php?test=ackermann&lang=nice&sort=fullcpu#program


BUILD COMMANDS FOR: ackermann.nice

Sat Jun 18 07:12:10 PDT 2005

cp /opt/shootout/shootout/bench/ackermann/ackermann.nice ackermann.nice
JAVA=/usr/lib/j2sdk1.4.2_05/bin/java /usr/bin/nicec --sourcepath .. -d
. -a o.jar tmp
nice.lang: parsing
tmp: parsing
tmp: typechecking
tmp: generating code
tmp: linking
tmp: writing in archive
nice.lang: writing in archive

Command line:
Error while writing archive (duplicate entry:
nice/lang/fun$printStackTraceWithSourceInfo.class)
compilation failed with 1 error
make[3]: [ackermann.nice_run] Error 2 (ignored)
JAVA=/usr/lib/j2sdk1.4.2_05/bin/java -jar o.jar 
/bin/sh: -jar: command not found
make[3]: [ackermann.nice_run] Error 127 (ignored)
rm ackermann.nice


		
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