it_should_behave_like - Could not find shared examples "a command method"

[hggh]

while building your gem for Debian, rake tests fails with missing shared examples

/usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:168:in `find_and_eval_shared': Could not find shared examples "a command method" (ArgumentError)
    from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:120:in `block in it_should_behave_like'
    from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:246:in `module_eval'
    from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:246:in `subclass'
    from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:232:in `describe'
    from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:119:in `it_should_behave_like'
    from /tmp/ruby-axiom-types-0.1.0/spec/unit/axiom/types/class_methods/finalize_spec.rb:11:in `block in <top (required)>'
    from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:246:in `module_eval'
    from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:246:in `subclass'
    from /usr/lib/ruby/vendor_ruby/rspec/core/example_group.rb:232:in `describe'
    from /usr/lib/ruby/vendor_ruby/rspec/core/dsl.rb:18:in `describe'
    from /tmp/ruby-axiom-types-0.1.0/spec/unit/axiom/types/class_methods/finalize_spec.rb:5:in `<top (required)>'
    from /usr/lib/ruby/vendor_ruby/rspec/core/configuration.rb:896:in `load'
    from /usr/lib/ruby/vendor_ruby/rspec/core/configuration.rb:896:in `block in load_spec_files'
    from /usr/lib/ruby/vendor_ruby/rspec/core/configuration.rb:896:in `each'
    from /usr/lib/ruby/vendor_ruby/rspec/core/configuration.rb:896:in `load_spec_files'
    from /usr/lib/ruby/vendor_ruby/rspec/core/command_line.rb:22:in `run'
    from /usr/lib/ruby/vendor_ruby/rspec/core/runner.rb:80:in `run'
    from /usr/lib/ruby/vendor_ruby/rspec/core/runner.rb:17:in `block in autorun'