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1st chunk of `nixos/doc/manual/release-notes/rl-1703.section.md`
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# Release 17.03 ("Gorilla", 2017/03/31) {#sec-release-17.03}

## Highlights {#sec-release-17.03-highlights}

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

- Nixpkgs is now extensible through overlays. See the [Nixpkgs manual](https://nixos.org/nixpkgs/manual/#sec-overlays-install) for more information.

- This release is based on Glibc 2.25, GCC 5.4.0 and systemd 232. The default Linux kernel is 4.9 and Nix is at 1.11.8.

- The default desktop environment now is KDE's Plasma 5. KDE 4 has been removed

- The setuid wrapper functionality now supports setting capabilities.

- X.org server uses branch 1.19. Due to ABI incompatibilities, `ati_unfree` keeps forcing 1.17 and `amdgpu-pro` starts forcing 1.18.

- Cross compilation has been rewritten. See the nixpkgs manual for details. The most obvious breaking change is that in derivations there is no `.nativeDrv` nor `.crossDrv` are now cross by default, not native.

- The `overridePackages` function has been rewritten to be replaced by [ overlays](https://nixos.org/nixpkgs/manual/#sec-overlays-install)

- Packages in nixpkgs can be marked as insecure through listed vulnerabilities. See the [Nixpkgs manual](https://nixos.org/nixpkgs/manual/#sec-allow-insecure) for more information.

- PHP now defaults to PHP 7.1

## New Services {#sec-release-17.03-new-services}

The following new services were added since the last release:

- `hardware/ckb.nix`

- `hardware/mcelog.nix`

- `hardware/usb-wwan.nix`

- `hardware/video/capture/mwprocapture.nix`

- `programs/adb.nix`

- `programs/chromium.nix`

- `programs/gphoto2.nix`

- `programs/java.nix`

- `programs/mtr.nix`

- `programs/oblogout.nix`

- `programs/vim.nix`

- `programs/wireshark.nix`

- `security/dhparams.nix`

- `services/audio/ympd.nix`

- `services/computing/boinc/client.nix`

- `services/continuous-integration/buildbot/master.nix`

- `services/continuous-integration/buildbot/worker.nix`

- `services/continuous-integration/gitlab-runner.nix`

- `services/databases/riak-cs.nix`

- `services/databases/stanchion.nix`

- `services/desktops/gnome3/gnome-terminal-server.nix`

- `services/editors/infinoted.nix`

- `services/hardware/illum.nix`

- `services/hardware/trezord.nix`

- `services/logging/journalbeat.nix`

- `services/mail/offlineimap.nix`

- `services/mail/postgrey.nix`

- `services/misc/couchpotato.nix`

- `services/misc/docker-registry.nix`

- `services/misc/errbot.nix`

- `services/misc/geoip-updater.nix`

- `services/misc/gogs.nix`

- `services/misc/leaps.nix`

- `services/misc/nix-optimise.nix`

- `services/misc/ssm-agent.nix`

- `services/misc/sssd.nix`

- `services/monitoring/arbtt.nix`

- `services/monitoring/netdata.nix`

- `services/monitoring/prometheus/default.nix`

- `services/monitoring/prometheus/alertmanager.nix`

- `services/monitoring/prometheus/blackbox-exporter.nix`

- `services/monitoring/prometheus/json-exporter.nix`

- `services/monitoring/prometheus/nginx-exporter.nix`

- `services/monitoring/prometheus/node-exporter.nix`

- `services/monitoring/prometheus/snmp-exporter.nix`

- `services/monitoring/prometheus/unifi-exporter.nix`

- `services/monitoring/prometheus/varnish-exporter.nix`

- `services/monitoring/sysstat.nix`

- `services/monitoring/telegraf.nix`

- `services/monitoring/vnstat.nix`

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

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

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

- `services/networking/dante.nix`

- `services/networking/dnscrypt-wrapper.nix`

- `services/networking/fakeroute.nix`

- `services/networking/flannel.nix`

- `services/networking/htpdate.nix`

- `services/networking/miredo.nix`

- `services/networking/nftables.nix`

- `services/networking/powerdns.nix`

- `services/networking/pdns-recursor.nix`

- `services/networking/quagga.nix`

- `services/networking/redsocks.nix`

- `services/networking/wireguard.nix`

- `services/system/cgmanager.nix`

- `services/torrent/opentracker.nix`
Title: NixOS Release 17.03 ("Gorilla") Highlights and New Services
Summary
This section details the highlights of NixOS Release 17.03, codenamed "Gorilla," which was released on March 31, 2017. Key updates include Nixpkgs extensibility through overlays, upgrades to Glibc 2.25, GCC 5.4.0, and systemd 232, and the adoption of Linux kernel 4.9 and Nix 1.11.8. The default desktop environment is now KDE Plasma 5, replacing KDE 4. The release also features improvements to setuid wrapper functionality, X.org server, cross compilation, and package security. Additionally, it lists numerous new services added since the previous release, spanning hardware, programs, security, and various system services.