我在Mac OS Yosemite上使用Sublime Text 3。我想使用LESS2CSS包，但它不起作用。以下是它给出的错误：
posh我已经安装了WARNING] Please install gem 'therubyracer' to use Less.
/Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- v8 (LoadError)
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less/java_script/v8_context.rb:2:in `<top (required)>'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less/java_script.rb:9:in `default_context_wrapper'
from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less/java_script.rb:17:in `context_wrapper'
from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less/loader.rb:13:in `initialize'
from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less.rb:14:in `new'
from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less.rb:14:in `<module:Less>'
from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/lib/less.rb:9:in `<top (required)>'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Library/Ruby/Gems/2.0.0/gems/less-2.6.0/bin/lessc:3:in `<top (required)>'
from /usr/bin/lessc:23:in `load'
from /usr/bin/lessc:23:in `<main>'
并安装了Node.js，但它仍无法使用。