NixOS 14.04 “Baboon” has been released, the second stable
release branch. It brings Linux 3.12, systemd 212, GCC 4.8,
Glibc 2.19, KDE 4.12, light-weight NixOS containers, and much
more. See the release
notes for details. You can get NixOS 14.04 ISOs and
VirtualBox appliances from the download page. For information on
how to upgrade a 13.10 system to 14.04, check out the manual
section on upgrading.
Distro