I am seeing the same thing, but I am curious as to how the original version 2.0 Beta2 was ever built then? I am wondering if maybe there are differences in the software versions I am using to run buildr. I am attempting to build ODE v2.0 beta2 on Windows XP using jruby (as opposed to ruby - since it seems you can't get a relatively recent working version of ruby for the Windows platform these days), all with Java version 1.5.0_15.
Because I am using jruby, I also use the following commands (buildr.log and buildr_test.log output files are attached) :
jruby -S buildr package test=no > buildr.log 2>&1
jruby -S buildr test > buildr_test.log 2>&1
I'd be interested to know what platform(s) are being successfully used for running buildr to build ODE.
p.s. The error can be found at the end of the buildr_test.log