```ruby
require "seche/version"

module Seche
  module Rails
    class Engine < ::Rails::Engine
    end
  end
end
```

Verify if Rails is defined
user
```ruby
require "seche/version"

module Seche
  if defined?(Rails) && defined?(Rails::Engine)
    module Rails
      class Engine < ::Rails::Engine
      end
    end
  else
    Sass.load_paths << File.expand_path("../../app/assets/stylesheets", __FILE__)
  end
end

```
assistant