<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-1.10">

<title>Release 1.10 (2015-09-03)</title>

<para>This is primarily a bug fix release. It also has a number of new
features:</para>

<itemizedlist>

  <listitem>
    <para>A number of builtin functions have been added to reduce
    Nixpkgs/NixOS evaluation time and memory consumption:
    <function>all</function>,
    <function>any</function>,
    <function>concatStringsSep</function>,
    <function>foldl’</function>,
    <function>genList</function>,
    <function>replaceStrings</function>,
    <function>sort</function>.
    </para>
  </listitem>

  <listitem>
    <para>The garbage collector is more robust when the disk is full.</para>
  </listitem>

  <listitem>
    <para>Nix supports a new API for building derivations that doesn’t
    require a <literal>.drv</literal> file to be present on disk; it
    only requires an in-memory representation of the derivation. This
    is used by the Hydra continuous build system to make remote builds
    more efficient.</para>
  </listitem>

  <listitem>
    <para>The function <literal>&lt;nix/fetchurl.nix></literal> now
    uses a <emphasis>builtin</emphasis> builder (i.e. it doesn’t
    require starting an external process; the download is performed by
    Nix itself). This ensures that derivation paths don’t change when
    Nix is upgraded, and obviates the need for ugly hacks to support
    chroot execution.</para>
  </listitem>

  <listitem>
    <para><option>--version -v</option> now prints some configuration
    information, in particular what compile-time optional features are
    enabled, and the paths of various directories.</para>
  </listitem>

  <listitem>
    <para>Build users have their supplementary groups set correctly.</para>
  </listitem>

</itemizedlist>

<para>This release has contributions from Eelco Dolstra, Guillaume
Maudoux, Iwan Aucamp, Jaka Hudoklin, Kirill Elagin, Ludovic Courtès,
Manolis Ragkousis, Nicolas B. Pierron and Shea Levy.</para>

</section>
