Undefined variable: "$icon-font-name"

[mylesmegyesi]

When I try to precompile assets, I get this error.

% RAILS_GROUPS=assets RAILS_ENV=development be rake assets:precompile
rake aborted!
Undefined variable: "$icon-font-name".
  (in /home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/anjlab-bootstrap-rails-3.0.0.2/app/assets/stylesheets/twitter/bootstrap/_glyphicons.scss:15)
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/anjlab-bootstrap-rails-3.0.0.2/app/assets/stylesheets/twitter/bootstrap/_glyphicons.scss:15
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/script/variable.rb:49:in `_perform'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/script/node.rb:40:in `perform'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/script/string_interpolation.rb:82:in `_perform'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/script/node.rb:40:in `perform'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/script/string_interpolation.rb:84:in `_perform'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/script/node.rb:40:in `perform'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/script/funcall.rb:99:in `block in _perform'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/script/funcall.rb:99:in `map'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/script/funcall.rb:99:in `_perform'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/script/node.rb:40:in `perform'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:298:in `visit_prop'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:37:in `visit'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:100:in `visit'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:53:in `block in visit_children'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:53:in `map'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:53:in `visit_children'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:109:in `block in visit_children'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:121:in `with_environment'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:108:in `visit_children'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:37:in `block in visit'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:356:in `visit_directive'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:37:in `visit'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:100:in `visit'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:53:in `block in visit_children'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:53:in `map'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:53:in `visit_children'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:109:in `block in visit_children'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:121:in `with_environment'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:108:in `visit_children'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:37:in `block in visit'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:128:in `visit_root'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/base.rb:37:in `visit'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:100:in `visit'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/visitors/perform.rb:7:in `visit'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/tree/root_node.rb:20:in `render'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/engine.rb:315:in `_render'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sass-3.2.10/lib/sass/engine.rb:262:in `render'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/bundler/gems/compass-rails-1749c06f15dc/lib/compass-rails/patches/static_compiler.rb:23:in `evaluate'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/tilt-1.4.1/lib/tilt/template.rb:103:in `render'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/context.rb:197:in `block in evaluate'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/context.rb:194:in `each'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/context.rb:194:in `evaluate'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/processed_asset.rb:12:in `initialize'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/base.rb:374:in `new'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/base.rb:374:in `block in build_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/base.rb:395:in `circular_call_protection'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/base.rb:373:in `build_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/index.rb:94:in `block in build_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/caching.rb:58:in `cache_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/index.rb:93:in `build_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/base.rb:287:in `find_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/index.rb:61:in `find_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/bundled_asset.rb:37:in `init_with'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/asset.rb:24:in `from_hash'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/caching.rb:54:in `cache_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/index.rb:93:in `build_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/base.rb:287:in `find_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/index.rb:61:in `find_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/manifest.rb:211:in `block in find_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/manifest.rb:257:in `benchmark'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/manifest.rb:210:in `find_asset'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/manifest.rb:119:in `block in compile'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/manifest.rb:118:in `each'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/sprockets/manifest.rb:118:in `compile'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-rails-2.0.0/lib/sprockets/rails/task.rb:60:in `block (3 levels) in define'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-2.10.0/lib/rake/sprocketstask.rb:146:in `with_logger'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/gems/sprockets-rails-2.0.0/lib/sprockets/rails/task.rb:59:in `block (2 levels) in define'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/bin/ruby_noexec_wrapper:14:in `eval'
/home/vagrant/.rvm/gems/ruby-2.0.0-p195/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => assets:precompile

I was able to fix it on a fork.

https://github.com/mylesmegyesi/bootstrap-rails/commit/ef7835428a23924eb097cab64afc52d5eb6c2f09

However, my fix seems like more of a bandaid that a true fix.