<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-2.2"> <title>Release 2.2 (201?-??-??)</title> <para>This release has the following changes:</para> <itemizedlist> <listitem> <para>The derivation attribute <varname>requiredSystemFeatures</varname> is now enforced for local builds, and not just to route builds to remote builders. The supported features of a machine can be specified through the configuration setting <varname>system-features</varname>. </para> </listitem> <listitem> <para>Sandbox builds are now enabled by default on Linux.</para> </listitem> </itemizedlist> </section>