npm start emits broccoli error about aws-cognito-angular-quickstart HOT 13 CLOSED

error: { [Error: variable @line-height-computed is undefined]
  type: 'Name',
  filename: 'input',
  index: 187,
  line: 10,
  callLine: NaN,
  callExtract: undefined,
  column: 18,
  extract: 
   [ '',
     '@bs-height-base: (@line-height-computed + @padding-base-vertical * 2);',
     '@bs-height-lg:   (floor(@font-size-large * @line-height-base) + @padding-large-vertical * 2);' ],
  message: 'variable @line-height-computed is undefined',
  stack: undefined }
error: { [Error: variable @alert-padding is undefined]
  type: 'Name',
  filename: 'input',
  index: 134,
  line: 10,
  callLine: NaN,
  callExtract: undefined,
  column: 11,
  extract: 
   [ '.alert {',
     '  padding: @alert-padding;',
     '  margin-bottom: @line-height-computed;' ],
  message: 'variable @alert-padding is undefined',
  stack: undefined }

cd ~

sudo apt-get update
sudo apt-get install python2.7-dev
git clone https://github.com/facebook/watchman.git
cd watchman
./autogen.sh
./configure
make
sudo make install

npm install -g [email protected] bower

sudo pip install awscli

cd ~/workspace

npm install
bower install

Unable to find a suitable version for font-awesome, please choose one by typing one of the numbers below:
    1) font-awesome#~4.2 which resolved to 4.2.0 and is required by bootstrap-social#4.8.0
    2) font-awesome#^4.2.0 which resolved to 4.6.3 and is required by aws-cognito-angular2-quickstart
    3) font-awesome#~4.6.3 which resolved to 4.6.3 and is required by startbootstrap-sb-admin-2#20f6ac3081

Prefix the choice with ! to persist it to bower.json

? Answer 3

 npm start

> [email protected] start /home/ubuntu/workspace
> ng server

Livereload server on http://localhost:49152
Serving on http://localhost:8080/
File: input (10)
The Broccoli Plugin: [LESSPlugin] failed with:
undefined

The broccoli plugin was instantiated at: 
    at LESSPlugin.Plugin (/home/ubuntu/workspace/node_modules/angular-cli/node_modules/broccoli-plugin/index.js:10:31)
    at LESSPlugin.CachingWriter [as constructor] (/home/ubuntu/workspace/node_modules/angular-cli/node_modules/broccoli-caching-writer/index.js:21:10)
    at new LESSPlugin (/home/ubuntu/workspace/node_modules/angular-cli/lib/broccoli/angular-broccoli-less.js:21:12)
    at Object.Plugin.build.compile.exports.makeBroccoliTree (/home/ubuntu/workspace/node_modules/angular-cli/lib/broccoli/angular-broccoli-less.js:52:12)
    at Angular2App._buildTree (/home/ubuntu/workspace/node_modules/angular-cli/lib/broccoli/angular2-app.js:133:27)
    at new Angular2App (/home/ubuntu/workspace/node_modules/angular-cli/lib/broccoli/angular2-app.js:53:23)
    at module.exports (/home/ubuntu/workspace/angular-cli-build.js:6:10)
    at Class.module.exports.Task.extend.setupBroccoliBuilder (/home/ubuntu/workspace/node_modules/angular-cli/node_modules/angular-cli/lib/models/builder.js:55:19)
    at Class.module.exports.Task.extend.init (/home/ubuntu/workspace/node_modules/angular-cli/node_modules/angular-cli/lib/models/builder.js:89:10)
    at new Class (/home/ubuntu/workspace/node_modules/angular-cli/node_modules/core-object/core-object.js:18:12)
    at Class.module.exports.Task.extend.run (/home/ubuntu/workspace/node_modules/angular-cli/node_modules/angular-cli/lib/tasks/serve.js:15:19)
    at /home/ubuntu/workspace/node_modules/angular-cli/node_modules/angular-cli/lib/commands/serve.js:64:24
    at lib$rsvp$$internal$$tryCatch (/home/ubuntu/workspace/node_modules/angular-cli/node_modules/rsvp/dist/rsvp.js:1036:16)
    at lib$rsvp$$internal$$invokeCallback (/home/ubuntu/workspace/node_modules/angular-cli/node_modules/rsvp/dist/rsvp.js:1048:17)
    at /home/ubuntu/workspace/node_modules/angular-cli/node_modules/rsvp/dist/rsvp.js:331:11
    at lib$rsvp$asap$$flush (/home/ubuntu/workspace/node_modules/angular-cli/node_modules/rsvp/dist/rsvp.js:1198:9)