View file phpBB3/config/installer/container/services_install_filesystem.yml

services:
    installer.install_filesystem.create_config_file:
        class: phpbb\install\module\install_filesystem\task\create_config_file
        arguments:
            - '@filesystem'
            - '@installer.helper.config'
            - '@installer.helper.database'
            - '@installer.helper.iohandler'
            - '%core.root_path%'
            - '%core.php_ext%'
            - '%installer.create_config_file.options%'
        tags:
            - { name: install_filesystem_install, order: 10 }

    installer.module.install_filesystem_collection:
        class: phpbb\di\ordered_service_collection
        arguments:
            - '@service_container'
        tags:
            - { name: service_collection, tag: install_filesystem_install, class_name_aware: true }

    installer.module.filesystem_install:
        class: phpbb\install\module\install_filesystem\module
        parent: installer.module_base
        arguments:
            - '@installer.module.install_filesystem_collection'
        tags:
            - { name: installer_install_module, order: 30 }