/.../.rvm/gems/ree-1.8.7-2010.02/gems/activesupport-2.3.10/lib/active_support/dependencies.rb:452:in `load_missing_constant': Expected /.../.rvm/gems/ree-1.8.7-2010.02/gems/haml-3.1.0.alpha.22/lib/sass/plugin.rb to define Sass::Plugin (LoadError)

from /.../.rvm/gems/ree-1.8.7-2010.02/gems/activesupport-2.3.10/lib/active_support/dependencies.rb:106:in `const_missing'
  from /.../Documents/myapp/config/environments/test.rb:14:in `load_environment'
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/rails-2.3.10/lib/initializer.rb:386:in `load_environment'
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/activesupport-2.3.10/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/rails-2.3.10/lib/initializer.rb:379:in `load_environment'
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/rails-2.3.10/lib/initializer.rb:137:in `process'
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/rails-2.3.10/lib/initializer.rb:113:in `send'
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/rails-2.3.10/lib/initializer.rb:113:in `run'
  from /.../Documents/myapp/config/environment.rb:6
  from /.../Documents/myapp/spec/spec_helper.rb:4:in `require'
  from /.../Documents/myapp/spec/spec_helper.rb:4
  from /.../Documents/myapp/spec/controllers/accounts_controller_spec.rb:1:in `require'
  from /.../Documents/myapp/spec/controllers/accounts_controller_spec.rb:1
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/rspec-1.3.1/lib/spec/runner/example_group_runner.rb:15:in `load'
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/rspec-1.3.1/lib/spec/runner/example_group_runner.rb:15:in `load_files'
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/rspec-1.3.1/lib/spec/runner/example_group_runner.rb:14:in `each'
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/rspec-1.3.1/lib/spec/runner/example_group_runner.rb:14:in `load_files'
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/rspec-1.3.1/lib/spec/runner/options.rb:134:in `run_examples'
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/rspec-1.3.1/lib/spec/runner/command_line.rb:9:in `run'
  from /.../.rvm/gems/ree-1.8.7-2010.02/gems/rspec-1.3.1/bin/spec:5
  from /.../.rvm/gems/ree-1.8.7-2010.02/bin/spec:19:in `load'
  from /.../.rvm/gems/ree-1.8.7-2010.02/bin/spec:19