1# Release 14.12 ("Caterpillar", 2014/12/30) {#sec-release-14.12}
2
3In addition to numerous new and upgraded packages, this release has the following highlights:
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5- Systemd has been updated to version 217, which has numerous [improvements.](http://lists.freedesktop.org/archives/systemd-devel/2014-October/024662.html)
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7- [Nix has been updated to 1.8.](https://www.mail-archive.com/nix-dev@lists.science.uu.nl/msg13957.html)
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9- NixOS is now based on Glibc 2.20.
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11- KDE has been updated to 4.14.
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13- The default Linux kernel has been updated to 3.14.
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15- If `users.mutableUsers` is enabled (the default), changes made to the declaration of a user or group will be correctly realised when running `nixos-rebuild`. For instance, removing a user specification from `configuration.nix` will cause the actual user account to be deleted. If `users.mutableUsers` is disabled, it is no longer necessary to specify UIDs or GIDs; if omitted, they are allocated dynamically.
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17Following new services were added since the last release:
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19- `atftpd`
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21- `bosun`
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23- `bspwm`
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25- `chronos`
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27- `collectd`
28
29- `consul`
30
31- `cpuminer-cryptonight`
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33- `crashplan`
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35- `dnscrypt-proxy`
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37- `docker-registry`
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39- `docker`
40
41- `etcd`
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43- `fail2ban`
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45- `fcgiwrap`
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47- `fleet`
48
49- `fluxbox`
50
51- `gdm`
52
53- `geoclue2`
54
55- `gitlab`
56
57- `gitolite`
58
59- `gnome3.gnome-documents`
60
61- `gnome3.gnome-online-miners`
62
63- `gnome3.gvfs`
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65- `gnome3.seahorse`
66
67- `hbase`
68
69- `i2pd`
70
71- `influxdb`
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73- `kubernetes`
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75- `liquidsoap`
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77- `lxc`
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79- `mailpile`
80
81- `mesos`
82
83- `mlmmj`
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85- `monetdb`
86
87- `mopidy`
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89- `neo4j`
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91- `nsd`
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93- `openntpd`
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95- `opentsdb`
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97- `openvswitch`
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99- `parallels-guest`
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101- `peerflix`
102
103- `phd`
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105- `polipo`
106
107- `prosody`
108
109- `radicale`
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111- `redmine`
112
113- `riemann`
114
115- `scollector`
116
117- `seeks`
118
119- `siproxd`
120
121- `strongswan`
122
123- `tcsd`
124
125- `teamspeak3`
126
127- `thermald`
128
129- `torque/mrom`
130
131- `torque/server`
132
133- `uhub`
134
135- `unifi`
136
137- `znc`
138
139- `zookeeper`
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141When upgrading from a previous release, please be aware of the following incompatible changes:
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143- The default version of Apache httpd is now 2.4. If you use the `extraConfig` option to pass literal Apache configuration text, you may need to update it --- see [Apache's documentation](http://httpd.apache.org/docs/2.4/upgrading.html) for details. If you wish to continue to use httpd 2.2, add the following line to your NixOS configuration:
144
145 ```nix
146 {
147 services.httpd.package = pkgs.apacheHttpd_2_2;
148 }
149 ```
150
151- PHP 5.3 has been removed because it is no longer supported by the PHP project. A [migration guide](http://php.net/migration54) is available.
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153- The host side of a container virtual Ethernet pair is now called `ve-container-name` rather than `c-container-name`.
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155- GNOME 3.10 support has been dropped. The default GNOME version is now 3.12.
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157- VirtualBox has been upgraded to 4.3.20 release. Users may be required to run `rm -rf /tmp/.vbox*`. The line `imports = [ <nixpkgs/nixos/modules/programs/virtualbox.nix> ]` is no longer necessary, use `services.virtualboxHost.enable = true` instead.
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159 Also, hardening mode is now enabled by default, which means that unless you want to use USB support, you no longer need to be a member of the `vboxusers` group.
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161- Chromium has been updated to 39.0.2171.65. `enablePepperPDF` is now enabled by default. `chromium*Wrapper` packages no longer exist, because upstream removed NSAPI support. `chromium-stable` has been renamed to `chromium`.
162
163- Python packaging documentation is now part of nixpkgs manual. To override the python packages available to a custom python you now use `pkgs.pythonFull.buildEnv.override` instead of `pkgs.pythonFull.override`.
164
165- `boot.resumeDevice = "8:6"` is no longer supported. Most users will want to leave it undefined, which takes the swap partitions automatically. There is an evaluation assertion to ensure that the string starts with a slash.
166
167- The system-wide default timezone for NixOS installations changed from `CET` to `UTC`. To choose a different timezone for your system, configure `time.timeZone` in `configuration.nix`. A fairly complete list of possible values for that setting is available at <https://en.wikipedia.org/wiki/List_of_tz_database_time_zones>.
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169- GNU screen has been updated to 4.2.1, which breaks the ability to connect to sessions created by older versions of screen.
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171- The Intel GPU driver was updated to the 3.x prerelease version (used by most distributions) and supports DRI3 now.