Error when installing vagrant-berkshelf on Windows XP SP3.

console.log

C:\Documents and Settings\Ian>vagrant plugin install vagrant-berkshelf
Installing the 'vagrant-berkshelf' plugin. This can take a few minutes...
C:/HashiCorp/Vagrant/embedded/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:556:in `rescue in block in build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

        C:/HashiCorp/Vagrant/embedded/bin/ruby.exe extconf.rb
creating Makefile

make
generating generator-i386-mingw32.def
compiling generator.c
linking shared-object json/ext/generator.so

make install
/usr/bin/install -c -m 0755 generator.so C:
/usr/bin/install -c -m 0755 generator.so .
/usr/bin/install: `generator.so' and `./generator.so' are the same file
make: *** [and] Error 1


Gem files will remain installed in C:/Documents and Settings/Ian/.vagrant.d/gems/gems/json-1.7.7 for inspection.
Results logged to C:/Documents and Settings/Ian/.vagrant.d/gems/gems/json-1.7.7/ext/json/ext/generator/gem_make.out
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:534:in `block in build_extensions'
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:509:in `each'
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:509:in `build_extensions'
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:180:in `install'
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/site_ruby/1.9.1/rubygems/dependency_installer.rb:297:in `block in install'
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/site_ruby/1.9.1/rubygems/dependency_installer.rb:270:in `each'
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/site_ruby/1.9.1/rubygems/dependency_installer.rb:270:in `each_with_index'
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/site_ruby/1.9.1/rubygems/dependency_installer.rb:270:in `install'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/commands/plugin/action/install_gem.rb:38:in `block in call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/commands/plugin/gem_helper.rb:42:in `block in with_environment'
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/site_ruby/1.9.1/rubygems/user_interaction.rb:40:in `use_ui'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/commands/plugin/gem_helper.rb:41:in `with_environment'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/commands/plugin/action/install_gem.rb:28:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/warden.rb:34:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/commands/plugin/action/bundler_check.rb:20:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/warden.rb:34:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/builder.rb:116:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/runner.rb:61:in `block in run'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/util/busy.rb:19:in `busy'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/action/runner.rb:61:in `run'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/commands/plugin/command/base.rb:17:in `action'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/commands/plugin/command/install.rb:44:in `execute'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/plugins/commands/plugin/command/root.rb:47:in `execute'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/cli.rb:46:in `execute'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/lib/vagrant/environment.rb:467:in `cli'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.2.2/bin/vagrant:84:in `<top (required)>'
        from C:/HashiCorp/Vagrant/bin//../embedded/../embedded/gems/bin/vagrant:23:in `load'
        from C:/HashiCorp/Vagrant/bin//../embedded/../embedded/gems/bin/vagrant:23:in `<main>'

gem_make.out

C:/HashiCorp/Vagrant/embedded/bin/ruby.exe extconf.rb
creating Makefile
 
make
generating generator-i386-mingw32.def
compiling generator.c
linking shared-object json/ext/generator.so
 
make install
/usr/bin/install -c -m 0755 generator.so C:
/usr/bin/install -c -m 0755 generator.so .
/usr/bin/install: `generator.so' and `./generator.so' are the same file
make: *** [and] Error 1