NixOS 21.05 Updates: Packagekit, Nginx, KDE Gear, Libreswan, Mailman, Nextcloud, Redis, Systemd, Mediatomb

- The `services.packagekit.backend` option has been removed as it only supported a single setting which would always be the default. Instead new [RFC 0042](https://github.com/NixOS/rfcs/blob/master/rfcs/0042-config-option.md) compliant [services.packagekit.settings](options.html#opt-services.packagekit.settings) and [services.packagekit.vendorSettings](options.html#opt-services.packagekit.vendorSettings) options have been introduced. - [Nginx](https://nginx.org) has been updated to stable version 1.20.0. Now nginx uses the zlib-ng library by default. - KDE Gear (formerly KDE Applications) is upgraded to 21.04, see its [release notes](https://kde.org/announcements/gear/21.04/) for details. The `kdeApplications` package set is now `kdeGear`, in keeping with the new name. The old name remains for compatibility, but it is deprecated. - [Libreswan](https://libreswan.org/) has been updated to version 4.4. The package now includes example configurations and manual pages by default. The NixOS module has been changed to use the upstream systemd units and write the configuration in the `/etc/ipsec.d/ ` directory. In addition, two new options have been added to specify connection policies ([services.libreswan.policies](options.html#opt-services.libreswan.policies)) and disable send/receive redirects ([services.libreswan.disableRedirects](options.html#opt-services.libreswan.disableRedirects)). - The Mailman NixOS module (`services.mailman`) has a new option [services.mailman.enablePostfix](options.html#opt-services.mailman.enablePostfix), defaulting to true, that controls integration with Postfix. If this option is disabled, default MTA config becomes not set and you should set the options in `services.mailman.settings.mta` according to the desired configuration as described in [Mailman documentation](https://mailman.readthedocs.io/en/latest/src/mailman/docs/mta.html). - The default-version of `nextcloud` is nextcloud21. Please note that it's _not_ possible to upgrade `nextcloud` across multiple major versions! This means that it's e.g. not possible to upgrade from nextcloud18 to nextcloud20 in a single deploy and most `20.09` users will have to upgrade to nextcloud20 first. The package can be manually upgraded by setting [services.nextcloud.package](options.html#opt-services.nextcloud.package) to nextcloud21. - The setting [services.redis.bind](options.html#opt-services.redis.bind) defaults to `127.0.0.1` now, making Redis listen on the loopback interface only, and not all public network interfaces. - NixOS now emits a deprecation warning if systemd's `StartLimitInterval` setting is used in a `serviceConfig` section instead of in a `unitConfig`; that setting is deprecated and now undocumented for the service section by systemd upstream, but still effective and somewhat buggy there, which can be confusing. See [\#45785](https://github.com/NixOS/nixpkgs/issues/45785) for details. All services should use [systemd.services._name_.startLimitIntervalSec](options.html#opt-systemd.services._name_.startLimitIntervalSec) or `StartLimitIntervalSec` in [systemd.services._name_.unitConfig](options.html#opt-systemd.services._name_.unitConfig) instead. - The `mediatomb` service declares new options. It also adapts existing options so the configuration generation is now lazy. The existing option `customCfg` (defaults to false), when enabled, stops the service configuration generation completely. It then expects the users to provide their own correct configuration at the right location (whereas the configuration was generated and not used at all before). The new option `transcodingOption` (defaults to no) allows a generated configuration. It makes the mediatomb service pulls the necessary runtime dependencies in the nix store (whereas it was generated with hardcoded values before). The new option `mediaDirectories` allows the users to declare autoscan media directories from their nixos configuration: ```nix { services.mediatomb.mediaDirectories = [

NixOS 21.05 brings several updates, including the removal of the `services.packagekit.backend` option, an update to Nginx 1.20.0, and an upgrade to KDE Gear 21.04. Libreswan has been updated to version 4.4 with new options for connection policies and disabling redirects. The Mailman module has a new option to control Postfix integration. Nextcloud defaults to version 21, with a warning about multi-version upgrades. Redis now defaults to binding to the loopback interface. A deprecation warning is emitted for using systemd's `StartLimitInterval` in a `serviceConfig` section. The Mediatomb service has new options for lazy configuration generation and autoscan media directories.