ece50d57ce
- Update the link to the manual to refer to the proper place. - Mention LTS Haskell and Stackage Nightly. - Minor cosmetic to improve readability.
291 lines
11 KiB
XML
291 lines
11 KiB
XML
<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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version="5.0"
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xml:id="sec-release-15.09">
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<title>Release 15.09 (“Dingo”, 2015/09/??)</title>
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<para>In addition to numerous new and upgraded packages, this release
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has the following highlights:</para>
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<itemizedlist>
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<listitem>
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<para>The <link xlink:href="http://haskell.org/">Haskell</link>
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packages infrastructure has been re-designed from the ground up
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("Haskell NG"). NixOS now distributes the latest version
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of every single package registered on <link
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xlink:href="http://hackage.haskell.org/">Hackage</link> -- well in
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excess of 8,000 Haskell packages. Detailed instructions on how to
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use that infrastructure can be found in the <link
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xlink:href="http://nixos.org/nixpkgs/manual/#users-guide-to-the-haskell-infrastructure">User's
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Guide to the Haskell Infrastructure</link>. Users migrating from an
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earlier release may find helpful information below, in the list of
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backwards-incompatible changes. Furthermore, we distribute 51(!)
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additional Haskell package sets that provide every single <link
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xlink:href="http://www.stackage.org/">LTS Haskell</link> release
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since version 0.0 as well as the most recent <link
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xlink:href="http://www.stackage.org/">Stackage Nightly</link>
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snapshot. The announcement <link
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xlink:href="http://lists.science.uu.nl/pipermail/nix-dev/2015-September/018138.html">"Full
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Stackage Support in Nixpkgs"</link> gives additional
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details.</para>
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</listitem>
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<listitem>
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<para>Nix has been updated to version 1.10, which among other
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improvements enables cryptographic signatures on binary caches for
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improved security.</para>
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</listitem>
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<listitem>
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<para>You can now keep your NixOS system up to date automatically
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by setting
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<programlisting>
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system.autoUpgrade.enable = true;
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</programlisting>
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This will cause the system to periodically check for updates in
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your current channel and run <command>nixos-rebuild</command>.</para>
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</listitem>
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<listitem>
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<para>This release is based on Glibc 2.21, GCC 4.9 and Linux
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3.18.</para>
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</listitem>
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</itemizedlist>
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<para>When upgrading from a previous release, please be aware of the
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following incompatible changes:
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<itemizedlist>
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<listitem><para><command>sshd</command> no longer supports DSA and ECDSA
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host keys by default. If you have existing systems with such host keys
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and want to continue to use them, please set
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<programlisting>
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system.stateVersion = "14.12";
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</programlisting>
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The new option <option>system.stateVersion</option> ensures that
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certain configuration changes that could break existing systems (such
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as the <command>sshd</command> host key setting) will maintain
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compatibility with the specified NixOS release. NixOps sets the state
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version of existing deployments automatically.</para></listitem>
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<listitem><para><command>cron</command> is no longer enabled by
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default, unless you have a non-empty
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<option>services.cron.systemCronJobs</option>. To force
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<command>cron</command> to be enabled, set
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<option>services.cron.enable = true</option>.</para></listitem>
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<listitem><para>Nix now requires binary caches to be cryptographically
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signed. If you have unsigned binary caches that you want to continue
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to use, you should set <option>nix.requireSignedBinaryCaches =
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false</option>.</para></listitem>
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<listitem><para>Steam now doesn't need root rights to work. Instead of using
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<literal>*-steam-chrootenv</literal>, you should now just run <literal>steam</literal>.
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<literal>steamChrootEnv</literal> package was renamed to <literal>steam</literal>,
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and old <literal>steam</literal> package -- to <literal>steamOriginal</literal>.
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</para></listitem>
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<listitem><para>CMPlayer has been renamed to bomi upstream. Package
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<literal>cmplayer</literal> was accordingly renamed to
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<literal>bomi</literal> </para></listitem>
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<listitem><para>Atom Shell has been renamed to Electron upstream. Package <literal>atom-shell</literal>
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was accordingly renamed to <literal>electron</literal>
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</para></listitem>
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<listitem><para>Elm is not released on Hackage anymore. You should now use <literal>elmPackages.elm</literal>
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which contains the latest Elm platform.</para></listitem>
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<listitem>
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<para>The CUPS printing service has been updated to version
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<literal>2.0.2</literal>. Furthermore its systemd service has been
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renamed to <literal>cups.service</literal>.</para>
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<para>Local printers are no longer shared or advertised by
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default. This behavior can be changed by enabling
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<option>services.printing.defaultShared</option> or
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<option>services.printing.browsing</option> respectively.</para>
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</listitem>
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<listitem>
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<para>
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The VirtualBox host and guest options have been named more
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consistently. They can now found in
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<option>virtualisation.virtualbox.host.*</option> instead of
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<option>services.virtualboxHost.*</option> and
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<option>virtualisation.virtualbox.guest.*</option> instead of
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<option>services.virtualboxGuest.*</option>.
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</para>
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<para>
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Also, there now is support for the <literal>vboxsf</literal> file
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system using the <option>fileSystems</option> configuration
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attribute. An example of how this can be used in a configuration:
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<programlisting>
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fileSystems."/shiny" = {
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device = "myshinysharedfolder";
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fsType = "vboxsf";
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};
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</programlisting>
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</para>
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</listitem>
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<listitem>
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<para>
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"<literal>nix-env -qa</literal>" no longer discovers
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Haskell packages by name. The only packages visible in the global
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scope are <literal>ghc</literal>, <literal>cabal-install</literal>,
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and <literal>stack</literal>, but all other packages are hidden. The
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reason for this inconvenience is the sheer size of the Haskell
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package set. Name-based lookups are expensive, and most
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<literal>nix-env -qa</literal> operations would become much slower
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if we'd add the entire Hackage database into the top level attribute
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set. Instead, the list of Haskell packages can be displayed by
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running:
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</para>
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<programlisting>
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nix-env -f "<nixpkgs>" -qaP -A haskellPackages
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</programlisting>
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<para>
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Executable programs written in Haskell can be installed with:
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</para>
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<programlisting>
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nix-env -f "<nixpkgs>" -iA haskellPackages.pandoc
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</programlisting>
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<para>
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Installing Haskell <emphasis>libraries</emphasis> this way, however, is no
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longer supported. See the next item for more details.
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</para>
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</listitem>
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<listitem>
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<para>
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Previous versions of NixOS came with a feature called
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<literal>ghc-wrapper</literal>, a small script that allowed GHC to
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transparently pick up on libraries installed in the user's profile. This
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feature has been deprecated; <literal>ghc-wrapper</literal> was removed
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from the distribution. The proper way to register Haskell libraries with
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the compiler now is the <literal>haskellPackages.ghcWithPackages</literal>
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function. The <link
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xlink:href="http://nixos.org/nixpkgs/manual/#users-guide-to-the-haskell-infrastructure">User's
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Guide to the Haskell Infrastructure</link> provides more information about
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this subject.
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</para>
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</listitem>
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<listitem>
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<para>
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All Haskell builds that have been generated with version 1.x of
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the <literal>cabal2nix</literal> utility are now invalid and need
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to be re-generated with a current version of
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<literal>cabal2nix</literal> to function. The most recent version
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of this tool can be installed by running
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<literal>nix-env -i cabal2nix</literal>.
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</para>
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</listitem>
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<listitem>
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<para>
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The <literal>haskellPackages</literal> set in Nixpkgs used to have a
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function attribute called <literal>extension</literal> that users
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could override in their <literal>~/.nixpkgs/config.nix</literal>
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files to configure additional attributes, etc. That function still
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exists, but it's now called <literal>overrides</literal>.
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</para>
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</listitem>
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<listitem>
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<para>
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The OpenBLAS library has been updated to version
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<literal>0.2.14</literal>. Support for the
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<literal>x86_64-darwin</literal> platform was added. Dynamic
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architecture detection was enabled; OpenBLAS now selects
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microarchitecture-optimized routines at runtime, so optimal
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performance is achieved without the need to rebuild OpenBLAS
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locally. OpenBLAS has replaced ATLAS in most packages which use an
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optimized BLAS or LAPACK implementation.
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</para>
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</listitem>
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<listitem>
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<para>
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The <literal>phpfpm</literal> is now using the default PHP version
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(<literal>pkgs.php</literal>) instead of PHP 5.4 (<literal>pkgs.php54</literal>).
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</para>
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</listitem>
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<listitem>
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<para>
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The <literal>locate</literal> service no longer indexes the Nix store
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by default, preventing packages with potentially numerous versions from
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cluttering the output. Indexing the store can be activated by setting
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<option>services.locate.includeStore = true</option>.
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</para>
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</listitem>
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<listitem>
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<para>
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The Nix expression search path (<envar>NIX_PATH</envar>) no longer
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contains <filename>/etc/nixos/nixpkgs</filename> by default. You
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can override <envar>NIX_PATH</envar> by setting
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<option>nix.nixPath</option>.
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</para>
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</listitem>
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</itemizedlist>
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</para>
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<para>Other notable improvements:
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<itemizedlist>
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<listitem><para>The nixos and nixpkgs channels were unified,
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so one <emphasis>can</emphasis> use <literal>nix-env -iA nixos.bash</literal>
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instead of <literal>nix-env -iA nixos.pkgs.bash</literal>.
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See <link xlink:href="https://github.com/NixOS/nixpkgs/commit/2cd7c1f198">the commit</link> for details.
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</para></listitem>
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<listitem>
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<para>
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Users running an SSH server who worry about the quality of their
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<literal>/etc/ssh/moduli</literal> file with respect to the
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<link
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xlink:href="https://stribika.github.io/2015/01/04/secure-secure-shell.html">vulnerabilities
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discovered in the Diffie-Hellman key exchange</link> can now
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replace OpenSSH's default version with one they generated
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themselves using the new
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<option>services.openssh.moduliFile</option> option.
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</para>
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</listitem>
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<listitem> <para>
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A newly packaged TeX Live 2015 is provided in <literal>pkgs.texlive</literal>,
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split into 6500 nix packages. For basic user documentation see
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<link xlink:href="https://github.com/NixOS/nixpkgs/blob/release-15.09/pkgs/tools/typesetting/tex/texlive-new/default.nix#L1"
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>the source</link>.
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Beware of <link xlink:href="https://github.com/NixOS/nixpkgs/issues/9757"
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>an issue</link> when installing a too large package set.
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The plan is to deprecate and maybe delete the original TeX packages
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until the next release.
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</para> </listitem>
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</itemizedlist>
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</para>
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</section>
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