Note that Sass is written in Ruby, so you’ll need Ruby installed as well. If you’re using OS X, it’s already there. Windows users can get it via the RubyInstaller for Windows. Linux users can install it with their package manager.
Most people will just want the standard stable Sass gem. To install this:
gem install sass
To get the latest and greatest Sass goodness, though, you’ll need something else. A prerelease gem is created automatically every time changes are made to the master branch. To install it:
gem install sass --pre
Installation from Git
Sass can also be installed directly from the Git repository:
git clone git://github.com/nex3/sass.git cd sass rake install