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

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<section xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xi="http://www.w3.org/2001/XInclude"
version="5.0"
xml:id="sec-release-unstable">
<title>Unstable</title>
<para>In addition to numerous new and upgraded packages, this release
has the following highlights:</para>
<itemizedlist>
<listitem>
<para>You can now pin a specific version of NixOS in your <filename>configuration.nix</filename>
by setting:
<programlisting>
nixos.path = ./nixpkgs-unstable-2015-12-06/nixos;
</programlisting>
This will make NixOS re-evaluate your configuration with the modules of
the specified NixOS version at the given path. For more details, see
<xref linkend="module-misc-nixos" /></para>
</listitem>
</itemizedlist>
<para>When upgrading from a previous release, please be aware of the
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following incompatible changes:</para>
<itemizedlist>
<listitem>
<para><command>wmiiSnap</command> has been replaced with
<command>wmii_hg</command>, but
<command>services.xserver.windowManager.wmii.enable</command> has
been updated respectively so this only affects you if you have
explicitly installed <command>wmiiSnap</command>.
</para>
</listitem>
<listitem>
<para><command>wmiimenu</command> is removed, as it has been
removed by the developers upstream. Use <command>wimenu</command>
from the <command>wmii-hg</command> package.</para>
</listitem>
<listitem>
<para>Gitit is no longer automatically added to the module list in
NixOS and as such there will not be any manual entries for it. You
will need to add an import statement to your NixOS configuration
in order to use it, e.g.
<programlisting><![CDATA[
{
imports = [ <nixos/modules/services/misc/gitit.nix> ];
}
]]></programlisting>
will include the Gitit service configuration options.</para>
</listitem>
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<listitem>
<para><command>nginx</command> does not accept flags for enabling and
disabling modules anymore. Instead it accepts <literal>modules</literal>
argument, which is a list of modules to be built in. All modules now
reside in <literal>nginxModules</literal> set. Example configuration:
<programlisting><![CDATA[
nginx.override {
modules = [ nginxModules.rtmp nginxModules.dav nginxModules.moreheaders ];
}
]]></programlisting>
</para>
</listitem>
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</itemizedlist>
</section>