nixpkgs/nixos/doc/manual/release-notes/rl-unstable.xml

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        xmlns:xlink="http://www.w3.org/1999/xlink"
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        xml:id="sec-release-unstable">

<title>Unstable revision</title>

<para>In addition to numerous new and upgraded packages, this release has the following highlights:

<!--<itemizedlist>

</itemizedlist>-->
</para>

<para>Following new services were added since the last release:

<itemizedlist>
<listitem><para><literal>brltty</literal></para></listitem>
<listitem><para><literal>marathon</literal></para></listitem>
</itemizedlist>
</para>

<para>When upgrading from a previous release, please be aware of the
following incompatible changes:

<itemizedlist>

<listitem><para>Steam now doesn't need root rights to work. Instead of using
<literal>*-steam-chrootenv</literal>, you should now just run <literal>steam</literal>.
<literal>steamChrootEnv</literal> package was renamed to <literal>steam</literal>,
and old <literal>steam</literal> package -- to <literal>steamOriginal</literal>.
</para></listitem>

<listitem><para>CMPlayer has been renamed to bomi upstream. Package <literal>cmplayer</literal>
was accordingly renamed to <literal>bomi</literal>
</para></listitem>

<listitem>
    <para>
        The default <literal>NIX_PATH</literal> for NixOS now includes
        <literal>/nix/var/nix/profiles/per-user/root/channels</literal>, so it's
        easy to add custom channels.
    </para>
    <para>
        Moreover, whenever a <command>nixos-rebuild &lt;action&gt;
        --upgrade</command> is issued, every channel that includes a file
        called <filename>.update-on-nixos-rebuild</filename> will be upgraded
        alongside of the <literal>nixos</literal> channel.
    </para>
</listitem>

<listitem>
  <para>
	The CUPS printing service has been updated to version <literal>2.0.2</literal>.
	Furthermore its systemd service has been renamed to <literal>cups.service</literal>.
  </para>
  <para>
	Local printers are no longer shared or advertised by default. This behavior
	can be changed by enabling <literal>services.printing.defaultShared</literal>
	or <literal>services.printing.browsing</literal> respectively.
  </para>
</listitem>

<listitem>
  <para>
    HPLIP (printer, scanner, and fax drivers for HP devices) has
    been updated to version <literal>3.15.4</literal>. This release
    adds support for the <literal>arm6l-linux</literal> and
    <literal>arm7l-linux</literal> platforms.
  </para>
</listitem>


</itemizedlist>
</para>

</chapter>