TypeError: Object #<Generator> has no method 'install'

[chiefy]

chief@vanhelsing ~/Documents/poop $ yo bootstrap:app
In what format would you like the Twitter Bootstrap stylesheets? (css/sass/less) css

/usr/lib/node_modules/generator-bootstrap/app/index.js:50
  this.install(packages[this.format]);
       ^
TypeError: Object #<Generator> has no method 'install'
    at Generator.bootstrapFiles (/usr/lib/node_modules/generator-bootstrap/app/index.js:50:8)
    at next (/usr/lib/node_modules/generator-bootstrap/node_modules/yeoman-generator/lib/base.js:275:18)
    at /usr/lib/node_modules/generator-bootstrap/node_modules/yeoman-generator/lib/base.js:267:11
    at next (/usr/lib/node_modules/generator-bootstrap/node_modules/yeoman-generator/lib/util/conflicter.js:52:14)
    at EventEmitter.resolve (/usr/lib/node_modules/generator-bootstrap/node_modules/yeoman-generator/lib/util/conflicter.js:64:5)
    at /usr/lib/node_modules/generator-bootstrap/node_modules/yeoman-generator/lib/base.js:262:20
    at Generator.<anonymous> (/usr/lib/node_modules/generator-bootstrap/app/index.js:37:5)
    at next (/usr/lib/node_modules/generator-bootstrap/node_modules/yeoman-generator/lib/actions/prompt.js:21:14)
    at /usr/lib/node_modules/generator-bootstrap/node_modules/yeoman-generator/lib/actions/prompt.js:33:7
    at Interface.onLine (/usr/lib/node_modules/generator-bootstrap/node_modules/yeoman-generator/node_modules/read/lib/read.js:110:5)

[chiefy]

Wow, quick service. Thanks!