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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-installing-behind-proxy">
+ <title>Installing behind a proxy</title>
+
+ <para>
+  To install NixOS behind a proxy, do the following before running
+  <literal>nixos-install</literal>.
+ </para>
+
+ <orderedlist numeration="arabic">
+  <listitem>
+   <para>
+    Update proxy configuration in
+    <literal>/mnt/etc/nixos/configuration.nix</literal> to keep the internet
+    accessible after reboot.
+   </para>
+<programlisting>
+networking.proxy.default = &quot;http://user:password@proxy:port/&quot;;
+networking.proxy.noProxy = &quot;127.0.0.1,localhost,internal.domain&quot;;
+</programlisting>
+  </listitem>
+  <listitem>
+   <para>
+    Setup the proxy environment variables in the shell where you are running
+    <literal>nixos-install</literal>.
+   </para>
+<programlisting>
+# proxy_url=&quot;http://user:password@proxy:port/&quot;
+# export http_proxy=&quot;$proxy_url&quot;
+# export HTTP_PROXY=&quot;$proxy_url&quot;
+# export https_proxy=&quot;$proxy_url&quot;
+# export HTTPS_PROXY=&quot;$proxy_url&quot;
+</programlisting>
+  </listitem>
+ </orderedlist>
+
+ <note>
+  <para>
+   If you are switching networks with different proxy configurations, use the
+   <literal>nesting.clone</literal> option in
+   <literal>configuration.nix</literal> to switch proxies at runtime. Refer to
+   <xref linkend="ch-options" /> for more information.
+  </para>
+ </note>
+</section>