Including node module on emberjs

I'm trying to include bulma module on my ember-cli-build file. It is a sass file. When I run the server I get this error:

ENOENT, no such file or directory '/Users/johnmolina/Documents/Node/super-rentals/tmp/funnel-input_base_path-http://ift.tt/1mm74G7'
Error: ENOENT, no such file or directory '/Users/johnmolina/Documents/Node/super-rentals/tmp/funnel-input_base_path-http://ift.tt/1mm74G7'
at Error (native)
at Object.fs.lstatSync (fs.js:792:18)
at symlink (/Users/johnmolina/Documents/Node/super-rentals/node_modules/ember-cli/node_modules/symlink-or-copy/index.js:63:26)
at Function.symlinkOrCopySync (/Users/johnmolina/Documents/Node/super-rentals/node_modules/ember-cli/node_modules/symlink-or-copy/index.js:58:5)
at Funnel._copy (/Users/johnmolina/Documents/Node/super-rentals/node_modules/ember-cli/node_modules/broccoli-funnel/index.js:398:19)
at Funnel.processFile (/Users/johnmolina/Documents/Node/super-rentals/node_modules/ember-cli/node_modules/broccoli-funnel/index.js:381:8)
at Funnel.applyPatch [as _applyPatch] (/Users/johnmolina/Documents/Node/super-rentals/node_modules/ember-cli/node_modules/broccoli-funnel/index.js:298:12)
at Funnel.<anonymous> (/Users/johnmolina/Documents/Node/super-rentals/node_modules/ember-cli/node_modules/broccoli-funnel/index.js:250:10)
at Array.forEach (native)
at Funnel.processFilters (/Users/johnmolina/Documents/Node/super-rentals/node_modules/ember-cli/node_modules/broccoli-funnel/index.js:249:9)

The only way it worked was moving it to my styles folder, I also tried on vendor folder, but it's not being recognized.