
It's now "<yy>.<mm>pre<commit-count>.<short-hash>" (e.g. "13.10pre5678.gfedcba") for the unstable branch, and "<yy>.<mm>.<commit-count>.<short-hash>" (e.g. "13.10.5678.gfedcba") for stable branches.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.