I've been trying multiple solutions to integrate bower assets in jekyll but none seem simple enough or future safe.
One interesting solution would be to add to sass_dir all gem assets dirs from any https://rails-assets.org gem (which converts any bower repo into a assets gem automatically) but I did not find docs that says it's possible. Or use bower and import the sass files. But without grunt.
The goal is to be able to @import sass from asset gems, push on gh-pages branch and let github deploy without any extra step.