# File lib/phusion_passenger/platform_info/apache.rb, line 366
        def self.a2enmod(options = {})
                apxs2 = options[:apxs2] || self.apxs2
                dir = File.dirname(apxs2)
                # a2enmod is supposed to be a Debian extension that only works
                # on the APT-installed Apache, so only return non-nil if we're
                # working against the APT-installed Apache.
                if dir == "/usr/bin" || dir == "/usr/sbin"
                        if env_defined?('A2ENMOD')
                                return ENV['A2ENMOD']
                        else
                                return find_apache2_executable("a2enmod", options)
                        end
                else
                        return nil
                end
        end