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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-1.0">
-
-<title>Release 1.0 (2012-05-11)</title>
-
-<para>There have been numerous improvements and bug fixes since the
-previous release.  Here are the most significant:</para>
-
-<itemizedlist>
-
-  <listitem>
-    <para>Nix can now optionally use the Boehm garbage collector.
-    This significantly reduces the Nix evaluator’s memory footprint,
-    especially when evaluating large NixOS system configurations.  It
-    can be enabled using the <option>--enable-gc</option> configure
-    option.</para>
-  </listitem>
-
-  <listitem>
-    <para>Nix now uses SQLite for its database.  This is faster and
-    more flexible than the old <emphasis>ad hoc</emphasis> format.
-    SQLite is also used to cache the manifests in
-    <filename>/nix/var/nix/manifests</filename>, resulting in a
-    significant speedup.</para>
-  </listitem>
-
-  <listitem>
-    <para>Nix now has an search path for expressions.  The search path
-    is set using the environment variable <envar>NIX_PATH</envar> and
-    the <option>-I</option> command line option.  In Nix expressions,
-    paths between angle brackets are used to specify files that must
-    be looked up in the search path.  For instance, the expression
-    <literal>&lt;nixpkgs/default.nix></literal> looks for a file
-    <filename>nixpkgs/default.nix</filename> relative to every element
-    in the search path.</para>
-  </listitem>
-
-  <listitem>
-    <para>The new command <command>nix-build --run-env</command>
-    builds all dependencies of a derivation, then starts a shell in an
-    environment containing all variables from the derivation.  This is
-    useful for reproducing the environment of a derivation for
-    development.</para>
-  </listitem>
-
-  <listitem>
-    <para>The new command <command>nix-store --verify-path</command>
-    verifies that the contents of a store path have not
-    changed.</para>
-  </listitem>
-
-  <listitem>
-    <para>The new command <command>nix-store --print-env</command>
-    prints out the environment of a derivation in a format that can be
-    evaluated by a shell.</para>
-  </listitem>
-
-  <listitem>
-    <para>Attribute names can now be arbitrary strings.  For instance,
-    you can write <literal>{ "foo-1.2" = …; "bla bla" = …; }."bla
-    bla"</literal>.</para>
-  </listitem>
-
-  <listitem>
-    <para>Attribute selection can now provide a default value using
-    the <literal>or</literal> operator.  For instance, the expression
-    <literal>x.y.z or e</literal> evaluates to the attribute
-    <literal>x.y.z</literal> if it exists, and <literal>e</literal>
-    otherwise.</para>
-  </listitem>
-
-  <listitem>
-    <para>The right-hand side of the <literal>?</literal> operator can
-    now be an attribute path, e.g., <literal>attrs ?
-    a.b.c</literal>.</para>
-  </listitem>
-
-  <listitem>
-    <para>On Linux, Nix will now make files in the Nix store immutable
-    on filesystems that support it.  This prevents accidental
-    modification of files in the store by the root user.</para>
-  </listitem>
-
-  <listitem>
-    <para>Nix has preliminary support for derivations with multiple
-    outputs.  This is useful because it allows parts of a package to
-    be deployed and garbage-collected separately.  For instance,
-    development parts of a package such as header files or static
-    libraries would typically not be part of the closure of an
-    application, resulting in reduced disk usage and installation
-    time.</para>
-  </listitem>
-
-  <listitem>
-    <para>The Nix store garbage collector is faster and holds the
-    global lock for a shorter amount of time.</para>
-  </listitem>
-
-  <listitem>
-    <para>The option <option>--timeout</option> (corresponding to the
-    configuration setting <literal>build-timeout</literal>) allows you
-    to set an absolute timeout on builds — if a build runs for more than
-    the given number of seconds, it is terminated.  This is useful for
-    recovering automatically from builds that are stuck in an infinite
-    loop but keep producing output, and for which
-    <literal>--max-silent-time</literal> is ineffective.</para>
-  </listitem>
-
-  <listitem>
-    <para>Nix development has moved to GitHub (<link
-    xlink:href="https://github.com/NixOS/nix" />).</para>
-  </listitem>
-
-</itemizedlist>
-
-</section>