# Release 15.09 ("Dingo", 2015/09/30) {#sec-release-15.09}

In addition to numerous new and upgraded packages, this release has the following highlights:

- The [Haskell](http://haskell.org/) packages infrastructure has been re-designed from the ground up ("Haskell NG"). NixOS now distributes the latest version of every single package registered on [Hackage](http://hackage.haskell.org/) -- well in excess of 8,000 Haskell packages. Detailed instructions on how to use that infrastructure can be found in the [User's Guide to the Haskell Infrastructure](https://nixos.org/nixpkgs/manual/#users-guide-to-the-haskell-infrastructure). Users migrating from an earlier release may find helpful information below, in the list of backwards-incompatible changes. Furthermore, we distribute 51(!) additional Haskell package sets that provide every single [LTS Haskell](http://www.stackage.org/) release since version 0.0 as well as the most recent [Stackage Nightly](http://www.stackage.org/) snapshot. The announcement ["Full Stackage Support in Nixpkgs"](https://nixos.org/nix-dev/2015-September/018138.html) gives additional details.

- Nix has been updated to version 1.10, which among other improvements enables cryptographic signatures on binary caches for improved security.

- You can now keep your NixOS system up to date automatically by setting

```nix
{
  system.autoUpgrade.enable = true;
}
```

This will cause the system to periodically check for updates in your current channel and run `nixos-rebuild`.

- This release is based on Glibc 2.21, GCC 4.9 and Linux 3.18.

- GNOME has been upgraded to 3.16.

- Xfce has been upgraded to 4.12.

- KDE 5 has been upgraded to KDE Frameworks 5.10, Plasma 5.3.2 and Applications 15.04.3. KDE 4 has been updated to kdelibs-4.14.10.

- E19 has been upgraded to 0.16.8.15.

The following new services were added since the last release:

- `services/mail/exim.nix`

- `services/misc/apache-kafka.nix`

- `services/misc/canto-daemon.nix`

- `services/misc/confd.nix`

- `services/misc/devmon.nix`

- `services/misc/gitit.nix`

- `services/misc/ihaskell.nix`

- `services/misc/mbpfan.nix`

- `services/misc/mediatomb.nix`

- `services/misc/mwlib.nix`

- `services/misc/parsoid.nix`

- `services/misc/plex.nix`

- `services/misc/ripple-rest.nix`

- `services/misc/ripple-data-api.nix`

- `services/misc/subsonic.nix`

- `services/misc/sundtek.nix`

- `services/monitoring/cadvisor.nix`

- `services/monitoring/das_watchdog.nix`

- `services/monitoring/grafana.nix`

- `services/monitoring/riemann-tools.nix`

- `services/monitoring/teamviewer.nix`

- `services/network-filesystems/u9fs.nix`

- `services/networking/aiccu.nix`

- `services/networking/asterisk.nix`

- `services/networking/bird.nix`

- `services/networking/charybdis.nix`

- `services/networking/docker-registry-server.nix`

- `services/networking/fan.nix`

- `services/networking/firefox/sync-server.nix`

- `services/networking/gateone.nix`

- `services/networking/heyefi.nix`

- `services/networking/i2p.nix`

- `services/networking/lambdabot.nix`

- `services/networking/mstpd.nix`

- `services/networking/nix-serve.nix`

- `services/networking/nylon.nix`

- `services/networking/racoon.nix`

- `services/networking/skydns.nix`

- `services/networking/shout.nix`

- `services/networking/softether.nix`

- `services/networking/sslh.nix`

- `services/networking/tinc.nix`

- `services/networking/tlsdated.nix`

- `services/networking/tox-bootstrapd.nix`

- `services/networking/tvheadend.nix`

- `services/networking/zerotierone.nix`

- `services/scheduling/marathon.nix`

- `services/security/fprintd.nix`

- `services/security/hologram.nix`

- `services/security/munge.nix`

- `services/system/cloud-init.nix`

- `services/web-servers/shellinabox.nix`

- `services/web-servers/uwsgi.nix`

- `services/x11/unclutter.nix`

- `services/x11/display-managers/sddm.nix`

- `system/boot/coredump.nix`

- `system/boot/loader/loader.nix`

- `system/boot/loader/generic-extlinux-compatible`

- `system/boot/networkd.nix`