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<refentry xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xi="http://www.w3.org/2001/XInclude">
<refmeta>
<refentrytitle><command>nixos-version</command></refentrytitle>
<manvolnum>8</manvolnum>
<refmiscinfo class="source">NixOS</refmiscinfo>
</refmeta>
<refnamediv>
<refname><command>nixos-version</command></refname>
<refpurpose>show the version of nixpkgs NixOS was built from</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>nixos-version</command>
<arg><option>--hash</option></arg>
<arg><option>--revision</option></arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsection><title>Description</title>
<para>This command describes the version of nixpkgs used to build
NixOS.</para>
<para>By default the output includes:</para>
<itemizedlist>
<listitem><para>The NixOS release</para></listitem>
<listitem><para>Number of commits since the release</para></listitem>
<listitem><para>Git SHA of the released commit</para></listitem>
<listitem><para>Codename of the NixOS release</para></listitem>
</itemizedlist>
</refsection>
<refsection><title>Example</title>
<para>Here is an example output, and corresponding information:
<screen>$ nixos-version
16.03.1011.6317da4 (Emu)
</screen>
</para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>Attribute</entry>
<entry>Value</entry>
</row>
</thead>
<tbody>
<row>
<entry>NixOS Release</entry>
<entry><literal>16.03</literal></entry>
</row>
<row>
<entry>Commit Count</entry>
<entry><literal>1011</literal></entry>
</row>
<row>
<entry>Commit SHA</entry>
<entry><literal>6317da4</literal></entry>
</row>
<row>
<entry>Release Codename</entry>
<entry><literal>Emu</literal></entry>
</row>
</tbody>
</tgroup>
</informaltable>
<para>
</para>
</refsection>
<refsection><title>Options</title>
<para>This command accepts the following options:</para>
<variablelist>
<varlistentry>
<term><option>--hash</option></term>
<term><option>--revision</option></term>
<listitem>
<para>The output will be the full hash of the git commit
<screen>$ nixos-version --hash
6317da40006f6bc2480c6781999c52d88dde2acf
</screen>
</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
</refentry>
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