$CFG->docroot = 'http://docs.moodle.org';
$CFG->langotherroot = $CFG->dataroot.'/lang';
$CFG->langlocalroot = $CFG->dataroot.'/lang';
-$CFG->directorypermissions = 00777;
+$CFG->directorypermissions = isset($distro->directorypermissions) ? $distro->directorypermissions : 00777; // let distros set dir permissions
$CFG->running_installer = true;
$CFG->early_install_lang = true;