building and installing mri_rel_1_8_6
Running command: autoconf
Running command: ./configure --prefix /Users/arthur/.multiruby/install/mri_rel_1_8_6 &> log.configure
Running command: nice make -j4 &> log.build
Running command: make install &> log.install
Running command: tar zxf /Users/arthur/.multiruby/versions/rubygems-1.1.1.tgz
Running command: ../ruby ./setup.rb --no-rdoc --no-ri &> ../log.rubygems
building and installing mri_rel_1_8_7
Running command: autoconf
Running command: ./configure --prefix /Users/arthur/.multiruby/install/mri_rel_1_8_7 &> log.configure
Running command: nice make -j4 &> log.build
Running command: make install &> log.install
Running command: tar zxf /Users/arthur/.multiruby/versions/rubygems-1.1.1.tgz
Running command: ../ruby ./setup.rb --no-rdoc --no-ri &> ../log.rubygems
building and installing mri_rel_1_9
Running command: autoconf
Running command: ./configure --prefix /Users/arthur/.multiruby/install/mri_rel_1_9 &> log.configure
Running command: nice make -j4 &> log.build
/usr/local/lib/ruby/gems/1.8/gems/ZenTest-3.10.0/lib/multiruby.rb:152:in `run': ERROR: Command failed with exit code 512 (RuntimeError)
	from /usr/local/lib/ruby/gems/1.8/gems/ZenTest-3.10.0/lib/multiruby.rb:271:in `build_and_install'
	from /usr/local/lib/ruby/gems/1.8/gems/ZenTest-3.10.0/lib/multiruby.rb:266:in `chdir'
	from /usr/local/lib/ruby/gems/1.8/gems/ZenTest-3.10.0/lib/multiruby.rb:266:in `build_and_install'
	from /usr/local/lib/ruby/gems/1.8/gems/ZenTest-3.10.0/lib/multiruby.rb:252:in `each'
	from /usr/local/lib/ruby/gems/1.8/gems/ZenTest-3.10.0/lib/multiruby.rb:252:in `build_and_install'
	from /usr/local/lib/ruby/gems/1.8/gems/ZenTest-3.10.0/lib/multiruby.rb:251:in `chdir'
	from /usr/local/lib/ruby/gems/1.8/gems/ZenTest-3.10.0/lib/multiruby.rb:251:in `build_and_install'
	from /usr/local/lib/ruby/gems/1.8/gems/ZenTest-3.10.0/lib/multiruby.rb:244:in `chdir'
	from /usr/local/lib/ruby/gems/1.8/gems/ZenTest-3.10.0/lib/multiruby.rb:244:in `build_and_install'
	from /usr/local/lib/ruby/gems/1.8/gems/ZenTest-3.10.0/bin/multiruby_setup:52
	from /usr/local/bin/multiruby_setup:19:in `load'
	from /usr/local/bin/multiruby_setup:19