title: Problems with jslint-v8 Ruby gem installation on Windows7 64-bit
body: <p>There is a problem during Rally App SDK 2.0p environment setup on Windows 7 (64-bit). I have installed Ruby 1.8.7-p358 from rubyinstaller.org and managed to install rake Ruby gem. But I have problems installing <strong>jslint-v8</strong> gem. It has dependencies on <strong>therubyracer</strong> and <strong>libv8</strong> gems which need to be built using Ruby DevKit. During the installation I got the following error:</p>
  
  <pre><code>C:\ruby&gt; gem install jslint-v8
  Temporarily enhancing PATH to include DevKit...
  Building native extensions.  This could take a while...
  ERROR:  Error installing jslint-v8:
      ERROR: Failed to build gem native extension.
  
      C:/ruby/bin/ruby.exe extconf.rb
  *** extconf.rb failed ***
  Could not create Makefile due to some reason, probably lack of
  necessary libraries and/or headers.  Check the mkmf.log file for more
  details.  You may need configuration options.
  
  Provided configuration options:
      --with-opt-dir
      --without-opt-dir
      --with-opt-include
      --without-opt-include=${opt-dir}/include
      --with-opt-lib
      --without-opt-lib=${opt-dir}/lib
      --with-make-prog
      --without-make-prog
      --srcdir=.
      --curdir
      --ruby=C:/ruby/bin/ruby
  extconf.rb:13: uninitialized constant Gem (NameError)
  Checking for Python...
  
  Gem files will remain installed in C:/ruby/lib/ruby/gems/1.8/gems/libv8-3.3.10.4 for inspection.
  Results logged to C:/ruby/lib/ruby/gems/1.8/gems/libv8-3.3.10.4/ext/libv8/gem_make.out
  </code></pre>
  
  <p>Does anyone know how to install it correctly in Win7?
  Thank you!</p>