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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="ssec-relnotes-1.1">
-
-<title>Release 1.1 (2012-07-18)</title>
-
-<para>This release has the following improvements:</para>
-
-<itemizedlist>
-
-  <listitem>
-    <para>On Linux, when doing a chroot build, Nix now uses various
-    namespace features provided by the Linux kernel to improve
-    build isolation.  Namely:
-    <itemizedlist>
-      <listitem><para>The private network namespace ensures that
-      builders cannot talk to the outside world (or vice versa): each
-      build only sees a private loopback interface.  This also means
-      that two concurrent builds can listen on the same port (e.g. as
-      part of a test) without conflicting with each
-      other.</para></listitem>
-      <listitem><para>The PID namespace causes each build to start as
-      PID 1.  Processes outside of the chroot are not visible to those
-      on the inside.  On the other hand, processes inside the chroot
-      <emphasis>are</emphasis> visible from the outside (though with
-      different PIDs).</para></listitem>
-      <listitem><para>The IPC namespace prevents the builder from
-      communicating with outside processes using SysV IPC mechanisms
-      (shared memory, message queues, semaphores).  It also ensures
-      that all IPC objects are destroyed when the builder
-      exits.</para></listitem>
-      <listitem><para>The UTS namespace ensures that builders see a
-      hostname of <literal>localhost</literal> rather than the actual
-      hostname.</para></listitem>
-      <listitem><para>The private mount namespace was already used by
-      Nix to ensure that the bind-mounts used to set up the chroot are
-      cleaned up automatically.</para></listitem>
-    </itemizedlist>
-    </para>
-  </listitem>
-
-  <listitem>
-    <para>Build logs are now compressed using
-    <command>bzip2</command>.  The command <command>nix-store
-    -l</command> decompresses them on the fly.  This can be disabled
-    by setting the option <literal>build-compress-log</literal> to
-    <literal>false</literal>.</para>
-  </listitem>
-
-  <listitem>
-    <para>The creation of build logs in
-    <filename>/nix/var/log/nix/drvs</filename> can be disabled by
-    setting the new option <literal>build-keep-log</literal> to
-    <literal>false</literal>.  This is useful, for instance, for Hydra
-    build machines.</para>
-  </listitem>
-
-  <listitem>
-    <para>Nix now reserves some space in
-    <filename>/nix/var/nix/db/reserved</filename> to ensure that the
-    garbage collector can run successfully if the disk is full.  This
-    is necessary because SQLite transactions fail if the disk is
-    full.</para>
-  </listitem>
-
-  <listitem>
-    <para>Added a basic <function>fetchurl</function> function.  This
-    is not intended to replace the <function>fetchurl</function> in
-    Nixpkgs, but is useful for bootstrapping; e.g., it will allow us
-    to get rid of the bootstrap binaries in the Nixpkgs source tree
-    and download them instead.  You can use it by doing
-    <literal>import &lt;nix/fetchurl.nix> { url =
-    <replaceable>url</replaceable>; sha256 =
-    "<replaceable>hash</replaceable>"; }</literal>. (Shea Levy)</para>
-  </listitem>
-
-  <listitem>
-    <para>Improved RPM spec file. (Michel Alexandre Salim)</para>
-  </listitem>
-
-  <listitem>
-    <para>Support for on-demand socket-based activation in the Nix
-    daemon with <command>systemd</command>.</para>
-  </listitem>
-
-  <listitem>
-    <para>Added a manpage for
-    <citerefentry><refentrytitle>nix.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
-  </listitem>
-
-  <listitem>
-    <para>When using the Nix daemon, the <option>-s</option> flag in
-    <command>nix-env -qa</command> is now much faster.</para>
-  </listitem>
-
-</itemizedlist>
-
-</section>