gistfile1.txt

[jruby:1.4.0RC1] potrero:tracker pivotal$ jruby -S gem uninstall twitter
Successfully uninstalled twitter-0.6.14
[jruby:1.4.0RC1] potrero:tracker pivotal$ jruby -S geminstaller
Invoking gem install for mongrel, version 1.1.5.
Invoking gem install for nokogiri, version 1.3.3.
Invoking gem install for twitter, version 0.6.14.
[RubyGems:stderr] ERROR:  Error installing twitter:
	ERROR: Failed to build gem native extension.

/Users/pivotal/.rvm/jruby-1.4.0RC1/bin/jruby extconf.rb
WARNING: JRuby does not support native extensions or the `mkmf' library.
         Check wiki.jruby.org for alternatives.
/Users/pivotal/.rvm/jruby-1.4.0RC1/lib/ruby/1.8/mkmf.rb:1:in `const_missing': uninitialized constant CONFIG (NameError)
	from extconf.rb:4


Gem files will remain installed in /Users/pivotal/.rvm/gems/jruby/1.4.0RC1/gems/json-1.1.9 for inspection.
Results logged to /Users/pivotal/.rvm/gems/jruby/1.4.0RC1/gems/json-1.1.9/ext/json/ext/generator/gem_make.out

Invoking gem install for json-jruby, version 1.1.7.
Invoking gem install for hpricot, version 0.6.164.
[jruby:1.4.0RC1] potrero:tracker pivotal$ jruby -S geminstaller
Invoking gem install for mongrel, version 1.1.5.
Invoking gem install for nokogiri, version 1.3.3.
Invoking gem install for json-jruby, version 1.1.7.
Invoking gem install for hpricot, version 0.6.164.