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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="ch-relnotes-0.6">
+
+<title>Release 0.6 (2004-11-14)</title>
+
+<itemizedlist>
+
+  <listitem>
+    <para>Rewrite of the normalisation engine.
+
+    <itemizedlist>
+
+      <listitem><para>Multiple builds can now be performed in parallel
+      (option <option>-j</option>).</para></listitem>
+
+      <listitem><para>Distributed builds.  Nix can now call a shell
+      script to forward builds to Nix installations on remote
+      machines, which may or may not be of the same platform
+      type.</para></listitem>
+
+      <listitem><para>Option <option>--fallback</option> allows
+      recovery from broken substitutes.</para></listitem>
+
+      <listitem><para>Option <option>--keep-going</option> causes
+      building of other (unaffected) derivations to continue if one
+      failed.</para></listitem>
+
+    </itemizedlist>
+
+    </para>
+
+  </listitem>
+
+  <listitem><para>Improvements to the garbage collector (i.e., it
+  should actually work now).</para></listitem>
+
+  <listitem><para>Setuid Nix installations allow a Nix store to be
+  shared among multiple users.</para></listitem>
+
+  <listitem><para>Substitute registration is much faster
+  now.</para></listitem>
+
+  <listitem><para>A utility <command>nix-build</command> to build a
+  Nix expression and create a symlink to the result int the current
+  directory; useful for testing Nix derivations.</para></listitem>
+
+  <listitem><para>Manual updates.</para></listitem>
+
+  <listitem>
+
+    <para><command>nix-env</command> changes:
+
+    <itemizedlist>
+
+      <listitem><para>Derivations for other platforms are filtered out
+      (which can be overridden using
+      <option>--system-filter</option>).</para></listitem>
+
+      <listitem><para><option>--install</option> by default now
+      uninstall previous derivations with the same
+      name.</para></listitem>
+
+      <listitem><para><option>--upgrade</option> allows upgrading to a
+      specific version.</para></listitem>
+
+      <listitem><para>New operation
+      <option>--delete-generations</option> to remove profile
+      generations (necessary for effective garbage
+      collection).</para></listitem>
+
+      <listitem><para>Nicer output (sorted,
+      columnised).</para></listitem>
+
+    </itemizedlist>
+
+    </para>
+
+  </listitem>
+
+  <listitem><para>More sensible verbosity levels all around (builder
+  output is now shown always, unless <option>-Q</option> is
+  given).</para></listitem>
+
+  <listitem>
+
+    <para>Nix expression language changes:
+
+    <itemizedlist>
+
+      <listitem><para>New language construct: <literal>with
+      <replaceable>E1</replaceable>;
+      <replaceable>E2</replaceable></literal> brings all attributes
+      defined in the attribute set <replaceable>E1</replaceable> in
+      scope in <replaceable>E2</replaceable>.</para></listitem>
+
+      <listitem><para>Added a <function>map</function>
+      function.</para></listitem>
+
+      <listitem><para>Various new operators (e.g., string
+      concatenation).</para></listitem>
+
+    </itemizedlist>
+
+    </para>
+
+  </listitem>
+
+  <listitem><para>Expression evaluation is much
+  faster.</para></listitem>
+
+  <listitem><para>An Emacs mode for editing Nix expressions (with
+  syntax highlighting and indentation) has been
+  added.</para></listitem>
+
+  <listitem><para>Many bug fixes.</para></listitem>
+
+</itemizedlist>
+
+</section>