introduction to bourbon trail issue

gistfile1.txt

➜  upcase-exercises  git clone git@git.upcase.com:uzzer/introduction-to-bourbon.git
Cloning into 'introduction-to-bourbon'...
remote: Counting objects: 18, done.
remote: Compressing objects: 100% (18/18), done.
remote: Total 18 (delta 3), reused 0 (delta 0)
Receiving objects: 100% (18/18), 5.42 KiB | 0 bytes/s, done.
Resolving deltas: 100% (3/3), done.
Checking connectivity... done.
➜  upcase-exercises  cd introduction-to-bourbon
➜  introduction-to-bourbon git:(master) bin/setup
Installing Dependencies...
node-bourbon@1.2.3 node_modules/node-bourbon

gulp-ruby-sass@0.7.1 node_modules/gulp-ruby-sass
├── dargs@0.1.0
├── slash@0.1.3
├── each-async@0.1.3
├── win-spawn@2.0.0
├── chalk@0.5.1 (ansi-styles@1.1.0, escape-string-regexp@1.0.3, supports-color@0.2.0, strip-ansi@0.3.0, has-ansi@0.1.0)
├── glob@4.5.3 (inherits@2.0.1, once@1.3.1, inflight@1.0.4, minimatch@2.0.4)
├── gulp-util@3.0.4 (array-differ@1.0.0, object-assign@2.0.0, beeper@1.0.0, array-uniq@1.0.2, lodash._reinterpolate@3.0.0, lodash._reescape@3.0.0, lodash._reevaluate@3.0.0, replace-ext@0.0.1, minimist@1.1.1, vinyl@0.4.6, chalk@1.0.0, lodash.template@3.4.0, through2@0.6.3, dateformat@1.0.11, multipipe@0.1.2)
└── gulp-intermediate@3.0.1 (rimraf@2.3.2, uuid@1.4.2, mkdirp@0.5.0, through2@0.5.1, gulp-util@2.2.20)

gulp@3.8.11 node_modules/gulp
├── pretty-hrtime@0.2.2
├── interpret@0.3.10
├── deprecated@0.0.1
├── archy@1.0.0
├── minimist@1.1.1
├── v8flags@2.0.3 (user-home@1.1.1)
├── tildify@1.0.0 (user-home@1.1.1)
├── chalk@0.5.1 (ansi-styles@1.1.0, escape-string-regexp@1.0.3, supports-color@0.2.0, strip-ansi@0.3.0, has-ansi@0.1.0)
├── semver@4.3.3
├── orchestrator@0.3.7 (stream-consume@0.1.0, sequencify@0.0.7, end-of-stream@0.1.5)
├── gulp-util@3.0.4 (array-differ@1.0.0, object-assign@2.0.0, beeper@1.0.0, array-uniq@1.0.2, lodash._reinterpolate@3.0.0, lodash._reescape@3.0.0, lodash._reevaluate@3.0.0, replace-ext@0.0.1, vinyl@0.4.6, chalk@1.0.0, lodash.template@3.4.0, through2@0.6.3, dateformat@1.0.11, multipipe@0.1.2)
├── liftoff@2.0.3 (extend@2.0.0, flagged-respawn@0.3.1, resolve@1.1.6, findup-sync@0.2.1)
└── vinyl-fs@0.3.13 (graceful-fs@3.0.6, strip-bom@1.0.0, vinyl@0.4.6, defaults@1.0.2, mkdirp@0.5.0, through2@0.6.3, glob-stream@3.1.18, glob-watcher@0.0.6)

gulp-concat@2.4.3 node_modules/gulp-concat
├── through@2.3.6
├── gulp-util@3.0.4 (array-differ@1.0.0, beeper@1.0.0, object-assign@2.0.0, array-uniq@1.0.2, lodash._reescape@3.0.0, lodash._reinterpolate@3.0.0, lodash._reevaluate@3.0.0, replace-ext@0.0.1, minimist@1.1.1, vinyl@0.4.6, chalk@1.0.0, lodash.template@3.4.0, through2@0.6.3, dateformat@1.0.11, multipipe@0.1.2)
└── concat-with-sourcemaps@1.0.2 (source-map@0.4.2)
➜  introduction-to-bourbon git:(master) bin/watch
[20:25:21] Using gulpfile ~/repos/education/upcase-exercises/introduction-to-bourbon/bin/Gulpfile.js
[20:25:21] Starting 'stylesheets'...
[20:25:21] Starting 'watch'...
[20:25:21] Finished 'watch' after 11 ms

events.js:85
      throw er; // Unhandled 'error' event
            ^
Error: spawn sass ENOENT
    at exports._errnoException (util.js:746:11)
    at Process.ChildProcess._handle.onexit (child_process.js:1046:32)
    at child_process.js:1137:20
    at process._tickCallback (node.js:355:11)
➜  introduction-to-bourbon git:(master)