yo map-key error

gistfile1.txt

$ yo webapp --coffee

     _-----_
    |       |
    |--(o)--|   .--------------------------.
   `---------´  |    Welcome to Yeoman,    |
    ( _´U`_ )   |   ladies and gentlemen!  |
    /___A___\   '__________________________'
     |  ~  |
   __'.___.'__
 ´   `  |° ´ Y `

Out of the box I include HTML5 Boilerplate, jQuery, and a Gruntfile.js to build your app.
[?] What more would you like? Bootstrap, Sass, Modernizr
[?] Would you like to use libsass? Read up more at 
https://github.com/andrew/node-sass#reporting-sass-compilation-and-syntax-issues: YesN) y
   create Gruntfile.js
   create package.json
   create .gitignore
   create .gitattributes
   create bower.json
   create .jshintrc
   create .editorconfig
   create app/favicon.ico
   create app/404.html
   create app/robots.txt
   create app/.htaccess
   create app/styles/main.scss
   create app/index.html
   create app/scripts/main.coffee


I'm all done. Running bower install & npm install for you to install the required dependencies. If this fails, try running the command yourself.


npm WARN package.json example@0.0.0 No description
npm WARN package.json example@0.0.0 No repository field.
npm WARN package.json example@0.0.0 No README data
[?] May bower anonymously report usage statistics to improve the tool over npm ERR! error rolling back Error: ENOTEMPTY, rmdir '/vagrant/example/node_modules/grunt-contrib-imagemin/node_modules/mkdirp/test'
npm ERR! error rolling back  grunt-contrib-imagemin@0.6.1 { [Error: ENOTEMPTY, rmdir '/vagrant/example/node_modules/grunt-contrib-imagemin/node_modules/mkdirp/test']
npm ERR! error rolling back   errno: 53,
npm ERR! error rolling back   code: 'ENOTEMPTY',
npm ERR! error rolling back   path: '/vagrant/example/node_modules/grunt-contrib-imagemin/node_modules/mkdirp/test' }
npm ERR! 404 Not Found
npm ERR! 404 
npm ERR! 404 'map-key' is not in the npm registry.
npm ERR! 404 You should bug the author to publish it
npm ERR! 404 It was specified as a dependency of 'image-min'
npm ERR! 404 
npm ERR! 404 Note that you can also install from a
npm ERR! 404 tarball, folder, or http url, or git url.

npm ERR! System Linux 3.13.0-35-generic
npm ERR! command "/usr/bin/node" "/usr/bin/npm" "install"
npm ERR! cwd /vagrant/example
npm ERR! node -v v0.10.31
npm ERR! npm -v 1.4.23
npm ERR! code E404
 
> phantomjs@1.9.7-15 install /vagrant/example/node_modules/grunt-mocha/node_modules/grunt-lib-phantomjs/node_modules/phantomjs
> node install.js

Download already available at /tmp/phantomjs/phantomjs-1.9.7-linux-x86_64.tar.bz2
Extracting tar contents (via spawned process)
Copying extracted folder /tmp/phantomjs/phantomjs-1.9.7-linux-x86_64.tar.bz2-extract-1409507692573/phantomjs-1.9.7-linux-x86_64 -> /vagrant/example/node_modules/grunt-mocha/node_modules/grunt-lib-phantomjs/node_modules/phantomjs/lib/phantom
Writing location.js file
Done. Phantomjs binary available at /vagrant/example/node_modules/grunt-mocha/node_modules/grunt-lib-phantomjs/node_modules/phantomjs/lib/phantom/bin/phantomjs
/
> node-sass@0.8.6 install /vagrant/example/node_modules/grunt-sass/node_modules/node-sass
> node build.js

`linux-x64-v8-3.14` exists; testing

  ․․․․․․․․․․․․․․․․․․․․․․

  22 passing (146ms)

Binary is fine; exiting
npm ERR! 
npm ERR! Additional logging details can be found in:
npm ERR!     /vagrant/example/npm-debug.log
npm ERR! not ok code 0

events.js:74
        throw TypeError('Uncaught, unspecified "error" event.');
              ^
TypeError: Uncaught, unspecified "error" event.
    at TypeError (<anonymous>)
    at Appgenerator.emit (events.js:74:15)
    at done (/home/vagrant/.npm/lib/node_modules/generator-webapp/node_modules/yeoman-generator/lib/base.js:318:16)
    at /home/vagrant/.npm/lib/node_modules/generator-webapp/node_modules/yeoman-generator/node_modules/async/lib/async.js:232:13
    at /home/vagrant/.npm/lib/node_modules/generator-webapp/node_modules/yeoman-generator/node_modules/async/lib/async.js:113:21
    at /home/vagrant/.npm/lib/node_modules/generator-webapp/node_modules/yeoman-generator/node_modules/async/lib/async.js:24:16
    at /home/vagrant/.npm/lib/node_modules/generator-webapp/node_modules/yeoman-generator/node_modules/async/lib/async.js:229:17
    at /home/vagrant/.npm/lib/node_modules/generator-webapp/node_modules/yeoman-generator/node_modules/async/lib/async.js:516:34
    at Appgenerator.<anonymous> (/home/vagrant/.npm/lib/node_modules/generator-webapp/node_modules/yeoman-generator/lib/actions/install.js:43:7)
    at ChildProcess.emit (events.js:117:20)