DEPRECATED: see v2.0 here https://npmjs.org/package/generator-bootstrap-less
$ sudo npm install -g yeoman-bootstrap-less
This will install the generator globally so you will be able to use it everywhere.
You may need to re-install the generator every time you update Yeoman.
Here is how to uninstall the generator
$ cd /usr/local/lib/node_modules/yeoman/node_modules/yeoman-generators/lib/generators
$ sudo rm -rf bootstrap-less/
Bootstrap-less need to use grunt-recess Grunt task to compile less files, so you need to install it in your project folder.
$ yeoman init bootstrap-less- Init your project with the last version of Twitter Bootstrap's less files
$ npm install grunt-recess- Install
grunt-recessin your project folder
yeoman server - Launch a preview server which will begin watching for changes
yeoman build - Build an optimized version of your app, ready to deploy