I have a Rails 3.1 project with the asset pipeline working great. The problem is that I need to reference images in my Sass, but Rails calculates image URLs. (This is particularly important in production, where Rails appends the Git hash of the image to its filename to bust caches.) For example, in app/assets/stylesheets/todos.css.scss: .button.checkable { background-image: url(/assets/tick.png);