There are new features:

• The bootstrap feature is now disabled by default. There were too many issues with it. You can enable it locally with --bootstrap-chroot, but first see knows bugs and issues.
• There is initial support for Fedora Modularity. You can add to config:

config_opts['module_enable'] = ['list', 'of', 'modules']
config_opts['module_install'] = ['module1/profile', 'module2/profile']

This will call dnf module enable list of modules and dnf module install module1/profile module2/profile during the init phase. EDIT: If you want to use this feature you have to have experimental DNF, it can be obtained from this Copr project.

There are some bugfixes:

• NSpawn chroot is switched off for EL6 targets [RHBZ#1456421].
• LVM root is not umounted when umount_root is set to false [RHBZ#1447658]
• Shell in NSpawn container is now called with --login so profile.d scripts are executed [RHBZ#1450516] [RHBZ#1462373]
• yum rather then yum-deprecated is used when using bootstrap chroot [RHBZ#1446294]
• Custom chroot does not use bootstrap [RHBZ#1448321]
• Mock now use dnf repoquery instead of repoquery for chroots which uses DNF.
• LVM’s scrub hook for bootstrap chroot is called [RHBZ#1446297]
• --mount will mount LVM volumes [RHBZ#1448017]