css - jekyll-sass-converter not working -

i'm french, sorry english, have problem jekyll

i installed gems: jekyll, jekyll-sass-converter

but jekyll dont convers styles.scss styles.css

i declared styles on _includes/head.html:

 <!-- css -->     <link rel="stylesheet" href="{{ site.baseurl }}css/styles.css"> 

assets declared on _config.yml:

sass:   sass_dir: _lib   style: compressed 

styles.scss output

// imports @import "base"; @import "main"; 

_lib folder output

/base.scss /main.scss 

github project: https://github.com/micaelandre/micaelandre.github.io

github issue: https://github.com/micaelandre/micaelandre.github.io/issues/1

website: https://micaelandre.github.io

jekyll convert sass files if .scss starts 2 lines of triple dashes, in css/styles.scss:

--- ---  // imports @import "base"; 

this generate: css/styles.css.

also note don't need explicitely install sass converter, 1 of jekyll gem dependency.