nixpkgs/nixos/doc/manual/from_md/release-notes/rl-2205.section.xml

<section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-release-22.05">
  <title>Release 22.05 (“Quokka”, 2022.05/??)</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 December 2022, handing over
        to 22.11.
      </para>
    </listitem>
  </itemizedlist>
  <section xml:id="sec-release-22.05-highlights">
    <title>Highlights</title>
    <itemizedlist>
      <listitem>
        <para>
          <literal>security.acme.defaults</literal> has been added to
          simplify configuring settings for many certificates at once.
          This also opens up the the option to use DNS-01 validation
          when using <literal>enableACME</literal> on web server virtual
          hosts (e.g.
          <literal>services.nginx.virtualHosts.*.enableACME</literal>).
        </para>
      </listitem>
      <listitem>
        <para>
          PHP 8.1 is now available
        </para>
      </listitem>
      <listitem>
        <para>
          Mattermost has been updated to extended support release 6.3,
          as the previously packaged extended support release 5.37 is
          <link xlink:href="https://docs.mattermost.com/upgrade/extended-support-release.html">reaching
          its end of life</link>. Migrations may take a while, see the
          <link xlink:href="https://docs.mattermost.com/install/self-managed-changelog.html#release-v6-3-extended-support-release">changelog</link>
          and
          <link xlink:href="https://docs.mattermost.com/upgrade/important-upgrade-notes.html">important
          upgrade notes</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          systemd services can now set
          <link linkend="opt-systemd.services">systemd.services.&lt;name&gt;.reloadTriggers</link>
          instead of <literal>reloadIfChanged</literal> for a more
          granular distinction between reloads and restarts.
        </para>
      </listitem>
    </itemizedlist>
  </section>
  <section xml:id="sec-release-22.05-new-services">
    <title>New Services</title>
    <itemizedlist>
      <listitem>
        <para>
          <link xlink:href="https://github.com/intel/linux-sgx#install-the-intelr-sgx-psw">aesmd</link>,
          the Intel SGX Architectural Enclave Service Manager. Available
          as
          <link linkend="opt-services.aesmd.enable">services.aesmd</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://docs.docker.com/engine/security/rootless/">rootless
          Docker</link>, a <literal>systemd --user</literal> Docker
          service which runs without root permissions. Available as
          <link xlink:href="options.html#opt-virtualisation.docker.rootless.enable">virtualisation.docker.rootless.enable</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://conduit.rs/">matrix-conduit</link>,
          a simple, fast and reliable chat server powered by matrix.
          Available as
          <link xlink:href="option.html#opt-services.matrix-conduit.enable">services.matrix-conduit</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://www.elastic.co/guide/en/beats/filebeat/current/filebeat-overview.html">filebeat</link>,
          a lightweight shipper for forwarding and centralizing log
          data. Available as
          <link linkend="opt-services.filebeat.enable">services.filebeat</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/linux-apfs/linux-apfs-rw">apfs</link>,
          a kernel module for mounting the Apple File System (APFS).
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://frrouting.org/">FRRouting</link>, a
          popular suite of Internet routing protocol daemons (BGP, BFD,
          OSPF, IS-IS, VVRP and others). Available as
          <link linkend="opt-services.ffr.babel.enable">services.frr</link>
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/hifi/heisenbridge">heisenbridge</link>,
          a bouncer-style Matrix IRC bridge. Available as
          <link xlink:href="options.html#opt-services.heisenbridge.enable">services.heisenbridge</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://ergo.chat">ergochat</link>, a modern
          IRC with IRCv3 features. Available as
          <link xlink:href="options.html#opt-services.ergochat.enable">services.ergochat</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/ngoduykhanh/PowerDNS-Admin">PowerDNS-Admin</link>,
          a web interface for the PowerDNS server. Available at
          <link xlink:href="options.html#opt-services.powerdns-admin.enable">services.powerdns-admin</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://invoiceplane.com">InvoicePlane</link>,
          web application for managing and creating invoices. Available
          at
          <link xlink:href="options.html#opt-services.invoiceplane.enable">services.invoiceplane</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://maddy.email">maddy</link>, a
          composable all-in-one mail server. Available as
          <link xlink:href="options.html#opt-services.maddy.enable">services.maddy</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/mgumz/mtr-exporter">mtr-exporter</link>,
          a Prometheus exporter for mtr metrics. Available as
          <link xlink:href="options.html#opt-services.mtr-exporter.enable">services.mtr-exporter</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://tetrd.app">tetrd</link>, share your
          internet connection from your device to your PC and vice versa
          through a USB cable. Available at
          <link linkend="opt-services.tetrd.enable">services.tetrd</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/JustArchiNET/ArchiSteamFarm">ArchiSteamFarm</link>,
          a C# application with primary purpose of idling Steam cards
          from multiple accounts simultaneously. Available as
          <link xlink:href="options.html#opt-services.archisteamfarm.enable">services.archisteamfarm</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://goteleport.com">teleport</link>,
          allows engineers and security professionals to unify access
          for SSH servers, Kubernetes clusters, web applications, and
          databases across all environments. Available at
          <link linkend="opt-services.teleport.enable">services.teleport</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://loic-sharma.github.io/BaGet/">BaGet</link>,
          a lightweight NuGet and symbol server. Available at
          <link linkend="opt-services.baget.enable">services.baget</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://moosefs.com">moosefs</link>, fault
          tolerant petabyte distributed file system. Available as
          <link linkend="opt-services.moosefs">moosefs</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/ThomasLeister/prosody-filer">prosody-filer</link>,
          a server for handling XMPP HTTP Upload requests. Available at
          <link linkend="opt-services.prosody-filer.enable">services.prosody-filer</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/audreyt/ethercalc">ethercalc</link>,
          an online collaborative spreadsheet. Available as
          <link xlink:href="options.html#opt-services.ethercalc.enable">services.ethercalc</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://timetagger.app">timetagger</link>,
          an open source time-tracker with an intuitive user experience
          and powerful reporting.
          <link xlink:href="options.html#opt-services.timetagger.enable">services.timetagger</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://www.rstudio.com/products/rstudio/#rstudio-server">rstudio-server</link>,
          a browser-based version of the RStudio IDE for the R
          programming language. Available as
          <link xlink:href="options.html#opt-services.rstudio-server.enable">services.rstudio-server</link>.
        </para>
      </listitem>
      <listitem>
        <para>
          <link xlink:href="https://github.com/juanfont/headscale">headscale</link>,
          an Open Source implementation of the
          <link xlink:href="https://tailscale.io">Tailscale</link>
          Control Server. Available as
          <link xlink:href="options.html#opt-services.headscale.enable">services.headscale</link>
        </para>
      </listitem>
    </itemizedlist>
  </section>
  <section xml:id="sec-release-22.05-incompatibilities">
    <title>Backward Incompatibilities</title>
    <itemizedlist>
      <listitem>
        <para>
          <literal>pkgs.ghc</literal> now refers to
          <literal>pkgs.targetPackages.haskellPackages.ghc</literal>.
          This <emphasis>only</emphasis> makes a difference if you are
          cross-compiling and will ensure that
          <literal>pkgs.ghc</literal> always runs on the host platform
          and compiles for the target platform (similar to
          <literal>pkgs.gcc</literal> for example).
          <literal>haskellPackages.ghc</literal> still behaves as
          before, running on the build platform and compiling for the
          host platform (similar to <literal>stdenv.cc</literal>). This
          means you don’t have to adjust your derivations if you use
          <literal>haskellPackages.callPackage</literal>, but when using
          <literal>pkgs.callPackage</literal> and taking
          <literal>ghc</literal> as an input, you should now use
          <literal>buildPackages.ghc</literal> instead to ensure cross
          compilation keeps working (or switch to
          <literal>haskellPackages.callPackage</literal>).
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>pkgs.ghc.withPackages</literal> as well as
          <literal>haskellPackages.ghcWithPackages</literal> etc. now
          needs be overridden directly, as opposed to overriding the
          result of calling it. Additionally, the
          <literal>withLLVM</literal> parameter has been renamed to
          <literal>useLLVM</literal>. So instead of
          <literal>(ghc.withPackages (p: [])).override { withLLVM = true; }</literal>,
          one needs to use
          <literal>(ghc.withPackages.override { useLLVM = true; }) (p: [])</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>pkgs.emacsPackages.orgPackages</literal> is removed
          because org elpa is deprecated. The packages in the top level
          of <literal>pkgs.emacsPackages</literal>, such as org and
          org-contrib, refer to the ones in
          <literal>pkgs.emacsPackages.elpaPackages</literal> and
          <literal>pkgs.emacsPackages.nongnuPackages</literal> where the
          new versions will release.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>services.kubernetes.addons.dashboard</literal> was
          removed due to it being an outdated version.
        </para>
      </listitem>
      <listitem>
        <para>
          The DHCP server (<literal>services.dhcpd4</literal>,
          <literal>services.dhcpd6</literal>) has been hardened. The
          service is now using the systemd’s
          <literal>DynamicUser</literal> mechanism to run as an
          unprivileged dynamically-allocated user with limited
          capabilities. The dhcpd state files are now always stored in
          <literal>/var/lib/dhcpd{4,6}</literal> and the
          <literal>services.dhcpd4.stateDir</literal> and
          <literal>service.dhcpd6.stateDir</literal> options have been
          removed. If you were depending on root privileges or
          set{uid,gid,cap} binaries in dhcpd shell hooks, you may give
          dhcpd more capabilities with e.g.
          <literal>systemd.services.dhcpd6.serviceConfig.AmbientCapabilities</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>mailpile</literal> email webclient
          (<literal>services.mailpile</literal>) has been removed due to
          its reliance on python2.
        </para>
      </listitem>
      <listitem>
        <para>
          The MoinMoin wiki engine
          (<literal>services.moinmoin</literal>) has been removed,
          because Python 2 is being retired from nixpkgs.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>wafHook</literal> hook now honors
          <literal>NIX_BUILD_CORES</literal> when
          <literal>enableParallelBuilding</literal> is not set
          explicitly. Packages can restore the old behaviour by setting
          <literal>enableParallelBuilding=false</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>pkgs.claws-mail-gtk2</literal>, representing Claws
          Mail’s older release version three, was removed in order to
          get rid of Python 2. Please switch to
          <literal>claws-mail</literal>, which is Claws Mail’s latest
          release based on GTK+3 and Python 3.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>writers.writePython2</literal> and corresponding
          <literal>writers.writePython2Bin</literal> convenience
          functions to create executable Python 2 scripts in the store
          were removed in preparation of removal of the Python 2
          interpreter. Scripts have to be converted to Python 3 for use
          with <literal>writers.writePython3</literal> or
          <literal>writers.writePyPy2</literal> needs to be used.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>buildGoModule</literal> was updated to use
          <literal>go_1_17</literal>, third party derivations that
          specify &gt;= go 1.17 in the main <literal>go.mod</literal>
          will need to regenerate their <literal>vendorSha256</literal>
          hash.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>gnome-passwordsafe</literal> package updated to
          <link xlink:href="https://gitlab.gnome.org/World/secrets/-/tags/6.0">version
          6.x</link> and renamed to <literal>gnome-secrets</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          If you previously used
          <literal>/etc/docker/daemon.json</literal>, you need to
          incorporate the changes into the new option
          <literal>virtualisation.docker.daemon.settings</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          The backward compatibility in
          <literal>services.wordpress</literal> to configure sites with
          the old interface has been removed. Please use
          <literal>services.wordpress.sites</literal> instead.
        </para>
      </listitem>
      <listitem>
        <para>
          The backward compatibility in
          <literal>services.dokuwiki</literal> to configure sites with
          the old interface has been removed. Please use
          <literal>services.dokuwiki.sites</literal> instead.
        </para>
      </listitem>
      <listitem>
        <para>
          opensmtpd-extras is no longer build with python2 scripting
          support due to python2 deprecation in nixpkgs
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>autorestic</literal> package has been upgraded
          from 1.3.0 to 1.5.0 which introduces breaking changes in
          config file, check
          <link xlink:href="https://autorestic.vercel.app/migration/1.4_1.5">their
          migration guide</link> for more details.
        </para>
      </listitem>
      <listitem>
        <para>
          For <literal>pkgs.python3.pkgs.ipython</literal>, its direct
          dependency
          <literal>pkgs.python3.pkgs.matplotlib-inline</literal> (which
          is really an adapter to integrate matplotlib in ipython if it
          is installed) does not depend on
          <literal>pkgs.python3.pkgs.matplotlib</literal> anymore. This
          is closer to a non-Nix install of ipython. This has the added
          benefit to reduce the closure size of
          <literal>ipython</literal> from ~400MB to ~160MB (including
          ~100MB for python itself).
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>documentation.man</literal> has been refactored to
          support choosing a man implementation other than GNU’s
          <literal>man-db</literal>. For this,
          <literal>documentation.man.manualPages</literal> has been
          renamed to
          <literal>documentation.man.man-db.manualPages</literal>. If
          you want to use the new alternative man implementation
          <literal>mandoc</literal>, add
          <literal>documentation.man = { enable = true; man-db.enable = false; mandoc.enable = true; }</literal>
          to your configuration.
        </para>
      </listitem>
      <listitem>
        <para>
          Normal users (with <literal>isNormalUser = true</literal>)
          which have non-empty <literal>subUidRanges</literal> or
          <literal>subGidRanges</literal> set no longer have additional
          implicit ranges allocated. To enable automatic allocation back
          set <literal>autoSubUidGidRange = true</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>idris2</literal> now requires
          <literal>--package</literal> when using packages
          <literal>contrib</literal> and <literal>network</literal>,
          while previously these idris2 packages were automatically
          loaded.
        </para>
      </listitem>
      <listitem>
        <para>
          The iputils package, which is installed by default, no longer
          provides the legacy tools <literal>tftpd</literal> and
          <literal>traceroute6</literal>. More tools
          (<literal>ninfod</literal>, <literal>rarpd</literal>, and
          <literal>rdisc</literal>) are going to be removed in the next
          release. See
          <link xlink:href="https://github.com/iputils/iputils/releases/tag/20211215">upstream’s
          release notes</link> for more details and available
          replacements.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>services.thelounge.private</literal> was removed in
          favor of <literal>services.thelounge.public</literal>, to
          follow with upstream changes.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>pkgs.docbookrx</literal> was removed since it’s
          unmaintained
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>tilp2</literal> was removed together with its module
        </para>
      </listitem>
      <listitem>
        <para>
          The options
          <literal>networking.interfaces.&lt;name&gt;.ipv4.routes</literal>
          and
          <literal>networking.interfaces.&lt;name&gt;.ipv6.routes</literal>
          are no longer ignored when using networkd instead of the
          default scripted network backend by setting
          <literal>networking.useNetworkd</literal> to
          <literal>true</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          MultiMC has been replaced with the fork PolyMC due to upstream
          developers being hostile to 3rd party package maintainers.
          PolyMC removes all MultiMC branding and is aimed at providing
          proper 3rd party packages like the one contained in Nixpkgs.
          This change affects the data folder where game instances and
          other save and configuration files are stored. Users with
          existing installations should rename
          <literal>~/.local/share/multimc</literal> to
          <literal>~/.local/share/polymc</literal>. The main config
          file’s path has also moved from
          <literal>~/.local/share/multimc/multimc.cfg</literal> to
          <literal>~/.local/share/polymc/polymc.cfg</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          The terraform 0.12 compatibility has been removed and the
          <literal>terraform.withPlugins</literal> and
          <literal>terraform-providers.mkProvider</literal>
          implementations simplified. Providers now need to be stored
          under
          <literal>$out/libexec/terraform-providers/&lt;registry&gt;/&lt;owner&gt;/&lt;name&gt;/&lt;version&gt;/&lt;os&gt;_&lt;arch&gt;/terraform-provider-&lt;name&gt;_v&lt;version&gt;</literal>
          (which mkProvider does).
        </para>
        <para>
          This breaks back-compat so it’s not possible to mix-and-match
          with previous versions of nixpkgs. In exchange, it now becomes
          possible to use the providers from
          <link xlink:href="https://github.com/numtide/nixpkgs-terraform-providers-bin">nixpkgs-terraform-providers-bin</link>
          directly.
        </para>
      </listitem>
      <listitem>
        <para>
          The existing <literal>pkgs.opentelemetry-collector</literal>
          has been moved to
          <literal>pkgs.opentelemetry-collector-contrib</literal> to
          match the actual source being the <quote>contrib</quote>
          edition. <literal>pkgs.opentelemetry-collector</literal> is
          now the actual core release of opentelemetry-collector. If you
          use the community contributions you should change the package
          you refer to. If you don’t need them update your commands from
          <literal>otelcontribcol</literal> to
          <literal>otelcorecol</literal> and enjoy a 7x smaller binary.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>pkgs.noto-fonts-cjk</literal> is now deprecated in
          favor of <literal>pkgs.noto-fonts-cjk-sans</literal> and
          <literal>pkgs.noto-fonts-cjk-serif</literal> because they each
          have different release schedules. To maintain compatibility
          with prior releases of Nixpkgs,
          <literal>pkgs.noto-fonts-cjk</literal> is currently an alias
          of <literal>pkgs.noto-fonts-cjk-sans</literal> and doesn’t
          include serif fonts.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>switch-to-configuration</literal> (the script that is
          run when running <literal>nixos-rebuild switch</literal> for
          example) has been reworked
        </para>
        <itemizedlist spacing="compact">
          <listitem>
            <para>
              The interface that allows activation scripts to restart
              units has been streamlined. Restarting and reloading is
              now done by a single file
              <literal>/run/nixos/activation-restart-list</literal> that
              honors <literal>restartIfChanged</literal> and
              <literal>reloadIfChanged</literal> of the units.
            </para>
            <itemizedlist spacing="compact">
              <listitem>
                <para>
                  Preferring to reload instead of restarting can still
                  be achieved using
                  <literal>/run/nixos/activation-reload-list</literal>.
                </para>
              </listitem>
            </itemizedlist>
          </listitem>
          <listitem>
            <para>
              The script now uses a proper ini-file parser to parse
              systemd units. Some values are now only searched in one
              section instead of in the entire unit. This is only
              relevant for units that don’t use the NixOS systemd moule.
            </para>
            <itemizedlist spacing="compact">
              <listitem>
                <para>
                  <literal>RefuseManualStop</literal>,
                  <literal>X-OnlyManualStart</literal>,
                  <literal>X-StopOnRemoval</literal>,
                  <literal>X-StopOnReconfiguration</literal> are only
                  searched in the <literal>[Unit]</literal> section
                </para>
              </listitem>
              <listitem>
                <para>
                  <literal>X-ReloadIfChanged</literal>,
                  <literal>X-RestartIfChanged</literal>,
                  <literal>X-StopIfChanged</literal> are only searched
                  in the <literal>[Service]</literal> section
                </para>
              </listitem>
            </itemizedlist>
          </listitem>
        </itemizedlist>
      </listitem>
      <listitem>
        <para>
          The <literal>services.bookstack.cacheDir</literal> option has
          been removed, since the cache directory is now handled by
          systemd.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>services.bookstack.extraConfig</literal> option
          has been replaced by
          <literal>services.bookstack.config</literal> which implements
          a
          <link xlink:href="https://github.com/NixOS/rfcs/blob/master/rfcs/0042-config-option.md">settings-style</link>
          configuration.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>lib.assertMsg</literal> and
          <literal>lib.assertOneOf</literal> no longer return
          <literal>false</literal> if the passed condition is
          <literal>false</literal>, <literal>throw</literal>ing the
          given error message instead (which makes the resulting error
          message less cluttered). This will not impact the behaviour of
          code using these functions as intended, namely as top-level
          wrapper for <literal>assert</literal> conditions.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>pkgs.vimPlugins.onedark-nvim</literal> now refers to
          <link xlink:href="https://github.com/navarasu/onedark.nvim">navarasu/onedark.nvim</link>
          (formerly refers to
          <link xlink:href="https://github.com/olimorris/onedarkpro.nvim">olimorris/onedarkpro.nvim</link>).
        </para>
      </listitem>
    </itemizedlist>
  </section>
  <section xml:id="sec-release-22.05-notable-changes">
    <title>Other Notable Changes</title>
    <itemizedlist>
      <listitem>
        <para>
          The option
          <link linkend="opt-services.redis.servers">services.redis.servers</link>
          was added to support per-application
          <literal>redis-server</literal> which is more secure since
          Redis databases are only mere key prefixes without any
          configuration or ACL of their own. Backward-compatibility is
          preserved by mapping old
          <literal>services.redis.settings</literal> to
          <literal>services.redis.servers.&quot;&quot;.settings</literal>,
          but you are strongly encouraged to name each
          <literal>redis-server</literal> instance after the application
          using it, instead of keeping that nameless one. Except for the
          nameless
          <literal>services.redis.servers.&quot;&quot;</literal> still
          accessible at <literal>127.0.0.1:6379</literal>, and to the
          members of the Unix group <literal>redis</literal> through the
          Unix socket <literal>/run/redis/redis.sock</literal>, all
          other <literal>services.redis.servers.${serverName}</literal>
          are only accessible by default to the members of the Unix
          group <literal>redis-${serverName}</literal> through the Unix
          socket <literal>/run/redis-${serverName}/redis.sock</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          The option
          <link linkend="opt-virtualisation.vmVariant">virtualisation.vmVariant</link>
          was added to allow users to make changes to the
          <literal>nixos-rebuild build-vm</literal> configuration that
          do not apply to their normal system.
        </para>
        <para>
          The <literal>config.system.build.vm</literal> attribute now
          always exists and defaults to the value from
          <literal>vmVariant</literal>. Configurations that import the
          <literal>virtualisation/qemu-vm.nix</literal> module
          themselves will override this value, such that
          <literal>vmVariant</literal> is not used.
        </para>
        <para>
          Similarly
          <link linkend="opt-virtualisation.vmVariantWithBootLoader">virtualisation.vmVariantWithBootloader</link>
          was added.
        </para>
      </listitem>
      <listitem>
        <para>
          The configuration portion of the <literal>nix-daemon</literal>
          module has been reworked and exposed as
          <link xlink:href="options.html#opt-nix-settings">nix.settings</link>:
        </para>
        <itemizedlist spacing="compact">
          <listitem>
            <para>
              Legacy options have been mapped to the corresponding
              options under under
              <link xlink:href="options.html#opt-nix.settings">nix.settings</link>
              but may be deprecated in the future.
            </para>
          </listitem>
          <listitem>
            <para>
              <link xlink:href="options.html#opt-nix.buildMachines.publicHostKey">nix.buildMachines.publicHostKey</link>
              has been added.
            </para>
          </listitem>
        </itemizedlist>
      </listitem>
      <listitem>
        <para>
          The
          <literal>writers.writePyPy2</literal>/<literal>writers.writePyPy3</literal>
          and corresponding
          <literal>writers.writePyPy2Bin</literal>/<literal>writers.writePyPy3Bin</literal>
          convenience functions to create executable Python 2/3 scripts
          using the PyPy interpreter were added.
        </para>
      </listitem>
      <listitem>
        <para>
          If you are using Wayland you can choose to use the Ozone
          Wayland support in Chrome and several Electron apps by setting
          the environment variable <literal>NIXOS_OZONE_WL=1</literal>
          (for example via
          <literal>environment.sessionVariables.NIXOS_OZONE_WL = &quot;1&quot;</literal>).
          This is not enabled by default because Ozone Wayland is still
          under heavy development and behavior is not always flawless.
          Furthermore, not all Electron apps use the latest Electron
          versions.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>influxdb2</literal> package was split into
          <literal>influxdb2-server</literal> and
          <literal>influxdb2-cli</literal>, matching the split that took
          place upstream. A combined <literal>influxdb2</literal>
          package is still provided in this release for backwards
          compatibilty, but will be removed at a later date.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>services.unifi.openPorts</literal> option default
          value of <literal>true</literal> is now deprecated and will be
          changed to <literal>false</literal> in 22.11. Configurations
          using this default will print a warning when rebuilt.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>security.acme</literal> certificates will now
          correctly check for CA revokation before reaching their
          minimum age.
        </para>
      </listitem>
      <listitem>
        <para>
          Removing domains from
          <literal>security.acme.certs._name_.extraDomainNames</literal>
          will now correctly remove those domains during rebuild/renew.
        </para>
      </listitem>
      <listitem>
        <para>
          MariaDB is now offered in several versions, not just the
          newest one. So if you have a need for running MariaDB 10.4 for
          example, you can now just set
          <literal>services.mysql.package = pkgs.mariadb_104;</literal>.
          In general, it is recommended to run the newest version, to
          get the newest features, while sticking with an LTS version
          will most likely provide a more stable experience. Sometimes
          software is also incompatible with the newest version of
          MariaDB.
        </para>
      </listitem>
      <listitem>
        <para>
          The option
          <link linkend="opt-programs.ssh.enableAskPassword">programs.ssh.enableAskPassword</link>
          was added, decoupling the setting of
          <literal>SSH_ASKPASS</literal> from
          <literal>services.xserver.enable</literal>. This allows easy
          usage in non-X11 environments, e.g. Wayland.
        </para>
      </listitem>
      <listitem>
        <para>
          <link linkend="opt-programs.ssh.knownHosts">programs.ssh.knownHosts</link>
          has gained an <literal>extraHostNames</literal> option to
          replace <literal>hostNames</literal>.
          <literal>hostNames</literal> is deprecated, but still
          available for now.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>services.stubby</literal> module was converted to
          a
          <link xlink:href="https://github.com/NixOS/rfcs/blob/master/rfcs/0042-config-option.md">settings-style</link>
          configuration.
        </para>
      </listitem>
      <listitem>
        <para>
          The option <literal>services.duplicati.dataDir</literal> has
          been added to allow changing the location of duplicati’s
          files.
        </para>
      </listitem>
      <listitem>
        <para>
          A new option
          <literal>boot.initrd.extraModprobeConfig</literal> has been
          added which can be used to configure kernel modules that are
          loaded in the initrd.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>nixos-generate-config</literal> now puts the dhcp
          configuration in <literal>hardware-configuration.nix</literal>
          instead of <literal>configuration.nix</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>fetchFromSourcehut</literal> now allows fetching
          repositories recursively using <literal>fetchgit</literal> or
          <literal>fetchhg</literal> if the argument
          <literal>fetchSubmodules</literal> is set to
          <literal>true</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          The option <literal>services.thelounge.plugins</literal> has
          been added to allow installing plugins for The Lounge. Plugins
          can be found in
          <literal>pkgs.theLoungePlugins.plugins</literal> and
          <literal>pkgs.theLoungePlugins.themes</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>firmwareLinuxNonfree</literal> package has been
          renamed to <literal>linux-firmware</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>services.mbpfan</literal> module was converted to
          a
          <link xlink:href="https://github.com/NixOS/rfcs/blob/master/rfcs/0042-config-option.md">RFC
          0042</link> configuration.
        </para>
      </listitem>
      <listitem>
        <para>
          The default value for
          <literal>programs.spacefm.settings.graphical_su</literal> got
          unset. It previously pointed to <literal>gksu</literal> which
          has been removed.
        </para>
      </listitem>
      <listitem>
        <para>
          A new module was added for the
          <link xlink:href="https://starship.rs/">Starship</link> shell
          prompt, providing the options
          <literal>programs.starship.enable</literal> and
          <literal>programs.starship.settings</literal>.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>services.mattermost.plugins</literal> has been added
          to allow the declarative installation of Mattermost plugins.
          Plugins are automatically repackaged using autoPatchelf.
        </para>
      </listitem>
      <listitem>
        <para>
          The <literal>zrepl</literal> package has been updated from
          0.4.0 to 0.5:
        </para>
        <itemizedlist spacing="compact">
          <listitem>
            <para>
              The RPC protocol version was bumped; all zrepl daemons in
              a setup must be updated and restarted before replication
              can resume.
            </para>
          </listitem>
          <listitem>
            <para>
              A bug involving encrypt-on-receive has been fixed. Read
              the
              <link xlink:href="https://zrepl.github.io/configuration/sendrecvoptions.html#job-recv-options-placeholder">zrepl
              documentation</link> and check the output of
              <literal>zfs get -r encryption,zrepl:placeholder PATH_TO_ROOTFS</literal>
              on the receiver.
            </para>
          </listitem>
        </itemizedlist>
      </listitem>
      <listitem>
        <para>
          Renamed option
          <literal>services.openssh.challengeResponseAuthentication</literal>
          to
          <literal>services.openssh.kbdInteractiveAuthentication</literal>.
          Reason is that the old name has been deprecated upstream.
          Using the old option name will still work, but produce a
          warning.
        </para>
      </listitem>
      <listitem>
        <para>
          The option
          <link linkend="opt-services.networking.networkmanager.enableFccUnlock">services.networking.networkmanager.enableFccUnlock</link>
          was added to support FCC unlock procedures. Since release
          1.18.4, the ModemManager daemon no longer automatically
          performs the FCC unlock procedure by default. See
          <link xlink:href="https://modemmanager.org/docs/modemmanager/fcc-unlock/">the
          docs</link> for more details.
        </para>
      </listitem>
      <listitem>
        <para>
          <literal>programs.tmux</literal> has a new option
          <literal>plugins</literal> that accepts a list of packages
          from the <literal>tmuxPlugins</literal> group. The specified
          packages are added to the system and loaded by
          <literal>tmux</literal>.
        </para>
      </listitem>
    </itemizedlist>
  </section>
</section>