nixpkgs/nixos/doc/manual/release-notes/rl-1404.xml

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         xmlns:xlink="http://www.w3.org/1999/xlink"
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         version="5.0"
         xml:id="sec-release-14.04">
 <title>Release 14.04 (“Baboon”, 2014/04/30)</title>

 <para>
  This is the second stable release branch of NixOS. In addition to numerous new and upgraded packages and modules, this release has the following highlights:
  <itemizedlist>
   <listitem>
    <para>
     Installation on UEFI systems is now supported. See <xref linkend="sec-installation"/> for details.
    </para>
   </listitem>
   <listitem>
    <para>
     Systemd has been updated to version 212, which has <link xlink:href="http://cgit.freedesktop.org/systemd/systemd/plain/NEWS?id=v212">numerous improvements</link>. NixOS now automatically starts systemd user instances when you log in. You can define global user units through the <option>systemd.unit.*</option> options.
    </para>
   </listitem>
   <listitem>
    <para>
     NixOS is now based on Glibc 2.19 and GCC 4.8.
    </para>
   </listitem>
   <listitem>
    <para>
     The default Linux kernel has been updated to 3.12.
    </para>
   </listitem>
   <listitem>
    <para>
     KDE has been updated to 4.12.
    </para>
   </listitem>
   <listitem>
    <para>
     GNOME 3.10 experimental support has been added.
    </para>
   </listitem>
   <listitem>
    <para>
     Nix has been updated to 1.7 (<link
  xlink:href="http://nixos.org/nix/manual/#ssec-relnotes-1.7">details</link>).
    </para>
   </listitem>
   <listitem>
    <para>
     NixOS now supports fully declarative management of users and groups. If you set <option>users.mutableUsers</option> to <literal>false</literal>, then the contents of <filename>/etc/passwd</filename> and <filename>/etc/group</filename> will be <link
  xlink:href="https://www.usenix.org/legacy/event/lisa02/tech/full_papers/traugott/traugott_html/">congruent</link> to your NixOS configuration. For instance, if you remove a user from <option>users.extraUsers</option> and run <command>nixos-rebuild</command>, the user account will cease to exist. Also, imperative commands for managing users and groups, such as <command>useradd</command>, are no longer available. If <option>users.mutableUsers</option> is <literal>true</literal> (the default), then behaviour is unchanged from NixOS 13.10.
    </para>
   </listitem>
   <listitem>
    <para>
     NixOS now has basic container support, meaning you can easily run a NixOS instance as a container in a NixOS host system. These containers are suitable for testing and experimentation but not production use, since they’re not fully isolated from the host. See <xref linkend="ch-containers"/> for details.
    </para>
   </listitem>
   <listitem>
    <para>
     Systemd units provided by packages can now be overridden from the NixOS configuration. For instance, if a package <literal>foo</literal> provides systemd units, you can say:
<programlisting>
systemd.packages = [ pkgs.foo ];
</programlisting>
     to enable those units. You can then set or override unit options in the usual way, e.g.
<programlisting>
systemd.services.foo.wantedBy = [ "multi-user.target" ];
systemd.services.foo.serviceConfig.MemoryLimit = "512M";
</programlisting>
    </para>
   </listitem>
  </itemizedlist>
 </para>

 <para>
  When upgrading from a previous release, please be aware of the following incompatible changes:
  <itemizedlist>
   <listitem>
    <para>
     Nixpkgs no longer exposes unfree packages by default. If your NixOS configuration requires unfree packages from Nixpkgs, you need to enable support for them explicitly by setting:
<programlisting>
nixpkgs.config.allowUnfree = true;
</programlisting>
     Otherwise, you get an error message such as:
<screen>
error: package ‘nvidia-x11-331.49-3.12.17’ in ‘…/nvidia-x11/default.nix:56’
  has an unfree license, refusing to evaluate
</screen>
    </para>
   </listitem>
   <listitem>
    <para>
     The Adobe Flash player is no longer enabled by default in the Firefox and Chromium wrappers. To enable it, you must set:
<programlisting>
nixpkgs.config.allowUnfree = true;
nixpkgs.config.firefox.enableAdobeFlash = true; # for Firefox
nixpkgs.config.chromium.enableAdobeFlash = true; # for Chromium
</programlisting>
    </para>
   </listitem>
   <listitem>
    <para>
     The firewall is now enabled by default. If you don’t want this, you need to disable it explicitly:
<programlisting>
networking.firewall.enable = false;
</programlisting>
    </para>
   </listitem>
   <listitem>
    <para>
     The option <option>boot.loader.grub.memtest86</option> has been renamed to <option>boot.loader.grub.memtest86.enable</option>.
    </para>
   </listitem>
   <listitem>
    <para>
     The <literal>mysql55</literal> service has been merged into the <literal>mysql</literal> service, which no longer sets a default for the option <option>services.mysql.package</option>.
    </para>
   </listitem>
   <listitem>
    <para>
     Package variants are now differentiated by suffixing the name, rather than the version. For instance, <filename>sqlite-3.8.4.3-interactive</filename> is now called <filename>sqlite-interactive-3.8.4.3</filename>. This ensures that <literal>nix-env -i sqlite</literal> is unambiguous, and that <literal>nix-env -u</literal> won’t “upgrade” <literal>sqlite</literal> to <literal>sqlite-interactive</literal> or vice versa. Notably, this change affects the Firefox wrapper (which provides plugins), as it is now called <literal>firefox-wrapper</literal>. So when using <command>nix-env</command>, you should do <literal>nix-env -e firefox; nix-env -i firefox-wrapper</literal> if you want to keep using the wrapper. This change does not affect declarative package management, since attribute names like <literal>pkgs.firefoxWrapper</literal> were already unambiguous.
    </para>
   </listitem>
   <listitem>
    <para>
     The symlink <filename>/etc/ca-bundle.crt</filename> is gone. Programs should instead use the environment variable <envar>OPENSSL_X509_CERT_FILE</envar> (which points to <filename>/etc/ssl/certs/ca-bundle.crt</filename>).
    </para>
   </listitem>
  </itemizedlist>
 </para>
</section>