<section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-release-21.11">
  <title>Release 21.11 (“?”, 2021.11/??)</title>
  <para>
    In addition to numerous new and upgraded packages, this release has
    the following highlights:
  </para>
  <itemizedlist spacing="compact">
    <listitem>
      <para>
        Support is planned until the end of June 2022, handing over to
        22.05.
      </para>
    </listitem>
  </itemizedlist>
  <section xml:id="sec-release-21.11-highlights">
    <title>Highlights</title>
    <itemizedlist>
      <listitem>
        <para>
          PHP now defaults to PHP 8.0, updated from 7.4.
        </para>
      </listitem>
      <listitem>
        <para>
          kOps now defaults to 1.21.0, which uses containerd as the
          default runtime.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>python3</literal> now defaults to Python 3.9, updated
          from Python 3.8.
        </para>
      </listitem>
      <listitem>
        <para>
          PostgreSQL now defaults to major version 13.
        </para>
      </listitem>
    </itemizedlist>
  </section>
  <section xml:id="sec-release-21.11-new-services">
    <title>New Services</title>
    <itemizedlist>
      <listitem>
        <para>
          <link xlink:href="https://digint.ch/btrbk/index.html">btrbk</link>,
          a backup tool for btrfs subvolumes, taking advantage of btrfs
          specific capabilities to create atomic snapshots and transfer
          them incrementally to your backup locations. Available as
          <link xlink:href="options.html#opt-services.brtbk.instances">services.btrbk</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/xrelkd/clipcat/">clipcat</link>,
          an X11 clipboard manager written in Rust. Available at
          [services.clipcat](options.html#o pt-services.clipcat.enable).
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/maxmind/geoipupdate">geoipupdate</link>,
          a GeoIP database updater from MaxMind. Available as
          <link xlink:href="options.html#opt-services.geoipupdate.enable">services.geoipupdate</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://www.isc.org/kea/">Kea</link>, ISCs
          2nd generation DHCP and DDNS server suite. Available at
          <link xlink:href="options.html#opt-services.kea">services.kea</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://sr.ht">sourcehut</link>, a
          collection of tools useful for software development. Available
          as
          <link xlink:href="options.html#opt-services.sourcehut.enable">services.sourcehut</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://download.pureftpd.org/pub/ucarp/README">ucarp</link>,
          an userspace implementation of the Common Address Redundancy
          Protocol (CARP). Available as
          <link xlink:href="options.html#opt-networking.ucarp.enable">networking.ucarp</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          Users of flashrom should migrate to
          <link xlink:href="options.html#opt-programs.flashrom.enable">programs.flashrom.enable</link>
          and add themselves to the <literal>flashrom</literal> group to
          be able to access programmers supported by flashrom.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://vikunja.io">vikunja</link>, a to-do
          list app. Available as
          <link linkend="opt-services.vikunja.enable">services.vikunja</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://www.snapraid.it/">snapraid</link>, a
          backup program for disk arrays. Available as
          <link linkend="opt-snapraid.enable">snapraid</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/hockeypuck/hockeypuck">Hockeypuck</link>,
          a OpenPGP Key Server. Available as
          <link linkend="opt-services.hockeypuck.enable">services.hockeypuck</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/buildkite/buildkite-agent-metrics">buildkite-agent-metrics</link>,
          a command-line tool for collecting Buildkite agent metrics,
          now has a Prometheus exporter available as
          <link linkend="opt-services.prometheus.exporters.buildkite-agent.enable">services.prometheus.exporters.buildkite-agent</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/prometheus/influxdb_exporter">influxdb-exporter</link>
          a Prometheus exporter that exports metrics received on an
          InfluxDB compatible endpoint is now available as
          <link linkend="opt-services.prometheus.exporters.influxdb.enable">services.prometheus.exporters.influxdb</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/matrix-discord/mx-puppet-discord">mx-puppet-discord</link>,
          a discord puppeting bridge for matrix. Available as
          <link linkend="opt-services.mx-puppet-discord.enable">services.mx-puppet-discord</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://www.meshcommander.com/meshcentral2/overview">MeshCentral</link>,
          a remote administration service (<quote>TeamViewer but
          self-hosted and with more features</quote>) is now available
          with a package and a module:
          <link linkend="opt-services.meshcentral.enable">services.meshcentral.enable</link>
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/Arksine/moonraker">moonraker</link>,
          an API web server for Klipper. Available as
          <link linkend="opt-services.moonraker.enable">moonraker</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/influxdata/influxdb">influxdb2</link>,
          a Scalable datastore for metrics, events, and real-time
          analytics. Available as
          <link linkend="opt-services.influxdb2.enable">services.influxdb2</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://posativ.org/isso/">isso</link>, a
          commenting server similar to Disqus. Available as
          <link linkend="opt-services.isso.enable">isso</link>
        </para>
      </listitem>
    </itemizedlist>
  </section>
  <section xml:id="sec-release-21.11-incompatibilities">
    <title>Backward Incompatibilities</title>
    <itemizedlist>
      <listitem>
        <para>
          The <literal>staticjinja</literal> package has been upgraded
          from 1.0.4 to 3.0.1
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>services.geoip-updater</literal> was broken and has
          been replaced by
          <link xlink:href="options.html#opt-services.geoipupdate.enable">services.geoipupdate</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          PHP 7.3 is no longer supported due to upstream not supporting
          this version for the entire lifecycle of the 21.11 release.
        </para>
      </listitem>
      <listitem>
        <para>
          Those making use of <literal>buildBazelPackage</literal> will
          need to regenerate the fetch hashes (preferred), or set
          <literal>fetchConfigured = false;</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>consul</literal> was upgraded to a new major release
          with breaking changes, see
          <link xlink:href="https://github.com/hashicorp/consul/releases/tag/v1.10.0">upstream
          changelog</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          fsharp41 has been removed in preference to use the latest
          dotnet-sdk
        </para>
      </listitem>
      <listitem>
        <para>
          The following F#-related packages have been removed for being
          unmaintaned. Please use <literal>fetchNuGet</literal> for
          specific packages.
        </para>
        <itemizedlist spacing="compact">
          <listitem>
            <para>
              ExtCore
            </para>
          </listitem>
          <listitem>
            <para>
              Fake
            </para>
          </listitem>
          <listitem>
            <para>
              Fantomas
            </para>
          </listitem>
          <listitem>
            <para>
              FsCheck
            </para>
          </listitem>
          <listitem>
            <para>
              FsCheck262
            </para>
          </listitem>
          <listitem>
            <para>
              FsCheckNunit
            </para>
          </listitem>
          <listitem>
            <para>
              FSharpAutoComplete
            </para>
          </listitem>
          <listitem>
            <para>
              FSharpCompilerCodeDom
            </para>
          </listitem>
          <listitem>
            <para>
              FSharpCompilerService
            </para>
          </listitem>
          <listitem>
            <para>
              FSharpCompilerTools
            </para>
          </listitem>
          <listitem>
            <para>
              FSharpCore302
            </para>
          </listitem>
          <listitem>
            <para>
              FSharpCore3125
            </para>
          </listitem>
          <listitem>
            <para>
              FSharpCore4001
            </para>
          </listitem>
          <listitem>
            <para>
              FSharpCore4117
            </para>
          </listitem>
          <listitem>
            <para>
              FSharpData
            </para>
          </listitem>
          <listitem>
            <para>
              FSharpData225
            </para>
          </listitem>
          <listitem>
            <para>
              FSharpDataSQLProvider
            </para>
          </listitem>
          <listitem>
            <para>
              FSharpFormatting
            </para>
          </listitem>
          <listitem>
            <para>
              FsLexYacc
            </para>
          </listitem>
          <listitem>
            <para>
              FsLexYacc706
            </para>
          </listitem>
          <listitem>
            <para>
              FsLexYaccRuntime
            </para>
          </listitem>
          <listitem>
            <para>
              FsPickler
            </para>
          </listitem>
          <listitem>
            <para>
              FsUnit
            </para>
          </listitem>
          <listitem>
            <para>
              Projekt
            </para>
          </listitem>
          <listitem>
            <para>
              Suave
            </para>
          </listitem>
          <listitem>
            <para>
              UnionArgParser
            </para>
          </listitem>
          <listitem>
            <para>
              ExcelDnaRegistration
            </para>
          </listitem>
          <listitem>
            <para>
              MathNetNumerics
            </para>
          </listitem>
        </itemizedlist>
      </listitem>
      <listitem>
        <para>
          <literal>programs.x2goserver</literal> is now
          <literal>services.x2goserver</literal>
        </para>
      </listitem>
      <listitem>
        <para>
          The following dotnet-related packages have been removed for
          being unmaintaned. Please use <literal>fetchNuGet</literal>
          for specific packages.
        </para>
        <itemizedlist spacing="compact">
          <listitem>
            <para>
              Autofac
            </para>
          </listitem>
          <listitem>
            <para>
              SystemValueTuple
            </para>
          </listitem>
          <listitem>
            <para>
              MicrosoftDiaSymReader
            </para>
          </listitem>
          <listitem>
            <para>
              MicrosoftDiaSymReaderPortablePdb
            </para>
          </listitem>
          <listitem>
            <para>
              SystemCollectionsImmutable
            </para>
          </listitem>
          <listitem>
            <para>
              SystemCollectionsImmutable131
            </para>
          </listitem>
          <listitem>
            <para>
              SystemReflectionMetadata
            </para>
          </listitem>
          <listitem>
            <para>
              NUnit350
            </para>
          </listitem>
          <listitem>
            <para>
              Deedle
            </para>
          </listitem>
          <listitem>
            <para>
              ExcelDna
            </para>
          </listitem>
          <listitem>
            <para>
              GitVersionTree
            </para>
          </listitem>
          <listitem>
            <para>
              NDeskOptions
            </para>
          </listitem>
        </itemizedlist>
      </listitem>
    </itemizedlist>
    <itemizedlist>
      <listitem>
        <para>
          The <literal>antlr</literal> package now defaults to the 4.x
          release instead of the old 2.7.7 version.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>pulseeffects</literal> package updated to
          <link xlink:href="https://github.com/wwmm/easyeffects/releases/tag/v6.0.0">version
          4.x</link> and renamed to <literal>easyeffects</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>libwnck</literal> package now defaults to the 3.x
          release instead of the old 2.31.0 version.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>bitwarden_rs</literal> packages and modules were
          renamed to <literal>vaultwarden</literal>
          <link xlink:href="https://github.com/dani-garcia/vaultwarden/discussions/1642">following
          upstream</link>. More specifically,
        </para>
        <itemizedlist>
          <listitem>
            <para>
              <literal>pkgs.bitwarden_rs</literal>,
              <literal>pkgs.bitwarden_rs-sqlite</literal>,
              <literal>pkgs.bitwarden_rs-mysql</literal> and
              <literal>pkgs.bitwarden_rs-postgresql</literal> were
              renamed to <literal>pkgs.vaultwarden</literal>,
              <literal>pkgs.vaultwarden-sqlite</literal>,
              <literal>pkgs.vaultwarden-mysql</literal> and
              <literal>pkgs.vaultwarden-postgresql</literal>,
              respectively.
            </para>
            <itemizedlist spacing="compact">
              <listitem>
                <para>
                  Old names are preserved as aliases for backwards
                  compatibility, but may be removed in the future.
                </para>
              </listitem>
              <listitem>
                <para>
                  The <literal>bitwarden_rs</literal> executable was
                  also renamed to <literal>vaultwarden</literal> in all
                  packages.
                </para>
              </listitem>
            </itemizedlist>
          </listitem>
          <listitem>
            <para>
              <literal>pkgs.bitwarden_rs-vault</literal> was renamed to
              <literal>pkgs.vaultwarden-vault</literal>.
            </para>
            <itemizedlist spacing="compact">
              <listitem>
                <para>
                  <literal>pkgs.bitwarden_rs-vault</literal> is
                  preserved as an alias for backwards compatibility, but
                  may be removed in the future.
                </para>
              </listitem>
              <listitem>
                <para>
                  The static files were moved from
                  <literal>/usr/share/bitwarden_rs</literal> to
                  <literal>/usr/share/vaultwarden</literal>.
                </para>
              </listitem>
            </itemizedlist>
          </listitem>
          <listitem>
            <para>
              The <literal>services.bitwarden_rs</literal> config module
              was renamed to <literal>services.vaultwarden</literal>.
            </para>
            <itemizedlist spacing="compact">
              <listitem>
                <para>
                  <literal>services.bitwarden_rs</literal> is preserved
                  as an alias for backwards compatibility, but may be
                  removed in the future.
                </para>
              </listitem>
            </itemizedlist>
          </listitem>
          <listitem>
            <para>
              <literal>systemd.services.bitwarden_rs</literal>,
              <literal>systemd.services.backup-bitwarden_rs</literal>
              and <literal>systemd.timers.backup-bitwarden_rs</literal>
              were renamed to
              <literal>systemd.services.vaultwarden</literal>,
              <literal>systemd.services.backup-vaultwarden</literal> and
              <literal>systemd.timers.backup-vaultwarden</literal>,
              respectively.
            </para>
            <itemizedlist spacing="compact">
              <listitem>
                <para>
                  Old names are preserved as aliases for backwards
                  compatibility, but may be removed in the future.
                </para>
              </listitem>
            </itemizedlist>
          </listitem>
          <listitem>
            <para>
              <literal>users.users.bitwarden_rs</literal> and
              <literal>users.groups.bitwarden_rs</literal> were renamed
              to <literal>users.users.vaultwarden</literal> and
              <literal>users.groups.vaultwarden</literal>, respectively.
            </para>
          </listitem>
          <listitem>
            <para>
              The data directory remains located at
              <literal>/var/lib/bitwarden_rs</literal>, for backwards
              compatibility.
            </para>
          </listitem>
        </itemizedlist>
      </listitem>
    </itemizedlist>
    <itemizedlist>
      <listitem>
        <para>
          <literal>yggdrasil</literal> was upgraded to a new major
          release with breaking changes, see
          <link xlink:href="https://github.com/yggdrasil-network/yggdrasil-go/releases/tag/v0.4.0">upstream
          changelog</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>icingaweb2</literal> was upgraded to a new release
          which requires a manual database upgrade, see
          <link xlink:href="https://github.com/Icinga/icingaweb2/releases/tag/v2.9.0">upstream
          changelog</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>isabelle</literal> package has been upgraded from
          2020 to 2021
        </para>
      </listitem>
      <listitem>
        <para>
          the <literal>mingw-64</literal> package has been upgraded from
          6.0.0 to 9.0.0
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>tt-rss</literal> was upgraded to the commit on
          2021-06-21, which has breaking changes. If you use
          <literal>services.tt-rss.extraConfig</literal> you should
          migrate to the <literal>putenv</literal>-style configuration.
          See
          <link xlink:href="https://community.tt-rss.org/t/rip-config-php-hello-classes-config-php/4337">this
          Discourse post</link> in the tt-rss forums for more details.
        </para>
      </listitem>
      <listitem>
        <para>
          The following Visual Studio Code extensions were renamed to
          keep the naming convention uniform.
        </para>
        <itemizedlist spacing="compact">
          <listitem>
            <para>
              <literal>bbenoist.Nix</literal> -&gt;
              <literal>bbenoist.nix</literal>
            </para>
          </listitem>
          <listitem>
            <para>
              <literal>CoenraadS.bracket-pair-colorizer</literal> -&gt;
              <literal>coenraads.bracket-pair-colorizer</literal>
            </para>
          </listitem>
          <listitem>
            <para>
              <literal>golang.Go</literal> -&gt;
              <literal>golang.go</literal>
            </para>
          </listitem>
        </itemizedlist>
      </listitem>
      <listitem>
        <para>
          <literal>services.uptimed</literal> now uses
          <literal>/var/lib/uptimed</literal> as its stateDirectory
          instead of <literal>/var/spool/uptimed</literal>. Make sure to
          move all files to the new directory.
        </para>
      </listitem>
      <listitem>
        <para>
          Deprecated package aliases in <literal>emacs.pkgs.*</literal>
          have been removed. These aliases were remnants of the old
          Emacs package infrastructure. We now use exact upstream names
          wherever possible.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>programs.neovim.runtime</literal> switched to a
          <literal>linkFarm</literal> internally, making it impossible
          to use wildcards in the <literal>source</literal> argument.
        </para>
      </listitem>
    </itemizedlist>
  </section>
  <section xml:id="sec-release-21.11-notable-changes">
    <title>Other Notable Changes</title>
    <itemizedlist>
      <listitem>
        <para>
          The setting
          <link xlink:href="options.html#opt-services.openssh.logLevel"><literal>services.openssh.logLevel</literal></link>
          <literal>&quot;VERBOSE&quot;</literal>
          <literal>&quot;INFO&quot;</literal>. This brings NixOS in line
          with upstream and other Linux distributions, and reduces log
          spam on servers due to bruteforcing botnets.
        </para>
        <para>
          However, if
          <link xlink:href="options.html#opt-services.fail2ban.enable"><literal>services.fail2ban.enable</literal></link>
          is <literal>true</literal>, the <literal>fail2ban</literal>
          will override the verbosity to
          <literal>&quot;VERBOSE&quot;</literal>, so that
          <literal>fail2ban</literal> can observe the failed login
          attempts from the SSH logs.
        </para>
      </listitem>
      <listitem>
        <para>
          Sway: The terminal emulator <literal>rxvt-unicode</literal> is
          no longer installed by default via
          <literal>programs.sway.extraPackages</literal>. The current
          default configuration uses <literal>alacritty</literal> (and
          soon <literal>foot</literal>) so this is only an issue when
          using a customized configuration and not installing
          <literal>rxvt-unicode</literal> explicitly.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>python3</literal> now defaults to Python 3.9. Python
          3.9 introduces many deprecation warnings, please look at the
          <link xlink:href="https://docs.python.org/3/whatsnew/3.9.html">What’s
          New In Python 3.9 post</link> for more information.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>claws-mail</literal> package now references the
          new GTK+ 3 release branch, major version 4. To use the GTK+ 2
          releases, one can install the
          <literal>claws-mail-gtk2</literal> package.
        </para>
      </listitem>
      <listitem>
        <para>
          The wordpress module provides a new interface which allows to
          use different webservers with the new option
          <link xlink:href="options.html#opt-services.wordpress.webserver"><literal>services.wordpress.webserver</literal></link>.
          Currently <literal>httpd</literal> and
          <literal>nginx</literal> are supported. The definitions of
          wordpress sites should now be set in
          <link xlink:href="options.html#opt-services.wordpress.sites"><literal>services.wordpress.sites</literal></link>.
        </para>
        <para>
          Sites definitions that use the old interface are automatically
          migrated in the new option. This backward compatibility will
          be removed in 22.05.
        </para>
      </listitem>
      <listitem>
        <para>
          The order of NSS (host) modules has been brought in line with
          upstream recommendations:
        </para>
        <itemizedlist spacing="compact">
          <listitem>
            <para>
              The <literal>myhostname</literal> module is placed before
              the <literal>resolve</literal> (optional) and
              <literal>dns</literal> entries, but after
              <literal>file</literal> (to allow overriding via
              <literal>/etc/hosts</literal> /
              <literal>networking.extraHosts</literal>, and prevent ISPs
              with catchall-DNS resolvers from hijacking
              <literal>.localhost</literal> domains)
            </para>
          </listitem>
          <listitem>
            <para>
              The <literal>mymachines</literal> module, which provides
              hostname resolution for local containers (registered with
              <literal>systemd-machined</literal>) is placed to the
              front, to make sure its mappings are preferred over other
              resolvers.
            </para>
          </listitem>
          <listitem>
            <para>
              If systemd-networkd is enabled, the
              <literal>resolve</literal> module is placed before
              <literal>files</literal> and
              <literal>myhostname</literal>, as it provides the same
              logic internally, with caching.
            </para>
          </listitem>
          <listitem>
            <para>
              The <literal>mdns(_minimal)</literal> module has been
              updated to the new priorities.
            </para>
          </listitem>
        </itemizedlist>
        <para>
          If you use your own NSS host modules, make sure to update your
          priorities according to these rules:
        </para>
        <itemizedlist spacing="compact">
          <listitem>
            <para>
              NSS modules which should be queried before
              <literal>resolved</literal> DNS resolution should use
              mkBefore.
            </para>
          </listitem>
          <listitem>
            <para>
              NSS modules which should be queried after
              <literal>resolved</literal>, <literal>files</literal> and
              <literal>myhostname</literal>, but before
              <literal>dns</literal> should use the default priority
            </para>
          </listitem>
          <listitem>
            <para>
              NSS modules which should come after <literal>dns</literal>
              should use mkAfter.
            </para>
          </listitem>
        </itemizedlist>
      </listitem>
      <listitem>
        <para>
          The
          <link xlink:href="options.html#opt-networking.wireless.iwd.enable">networking.wireless.iwd</link>
          module has a new
          <link xlink:href="options.html#opt-networking.wireless.iwd.settings">networking.wireless.iwd.settings</link>
          option.
        </para>
      </listitem>
      <listitem>
        <para>
          The
          <link xlink:href="options.html#opt-services.syncoid.enable">services.syncoid.enable</link>
          module now properly drops ZFS permissions after usage. Before
          it delegated permissions to whole pools instead of datasets
          and didn’t clean up after execution. You can manually look
          this up for your pools by running
          <literal>zfs allow your-pool-name</literal> and use
          <literal>zfs unallow syncoid your-pool-name</literal> to clean
          this up.
        </para>
      </listitem>
      <listitem>
        <para>
          Zfs: <literal>latestCompatibleLinuxPackages</literal> is now
          exported on the zfs package. One can use
          <literal>boot.kernelPackages = config.boot.zfs.package.latestCompatibleLinuxPackages;</literal>
          to always track the latest compatible kernel with a given
          version of zfs.
        </para>
      </listitem>
    </itemizedlist>
  </section>
</section>
