SELECT `build_assignments`.`id` FROM `build_assignments` JOIN `build_slaves` ON `build_assignments`.`id`=`build_slaves`.`currently_building` JOIN `binary_packages` ON `build_assignments`.`id`=`binary_packages`.`build_assignment` JOIN `binary_packages_in_repositories` ON `binary_packages`.`id`=`binary_packages_in_repositories`.`package` JOIN `architecture_compatibilities` ON `architecture_compatibilities`.`built_for`=`build_assignments`.`architecture` JOIN `architectures` ON `architecture_compatibilities`.`runs_on`=`architectures`.`id` WHERE `build_slaves`.`id`=from_base64("Mw==") AND `binary_packages_in_repositories`.`repository`= AND `architectures`.`name` = from_base64("aTY4Ng==") LIMIT 1;