I create a new rails project,and add
gem \'bootstrap-sass\'
to my Gemfile, then I run bundle install and every things going good.
bundle install
Probably a little late to the party, but just in case anyone else stumbles across the question...
This was a small gotcha I Solved by adding @import "bootstrap"; to the top of my application.css file, the renamed the file to application.css.scss
@import "bootstrap";
application.css
application.css.scss
Hope this helps.