Nix - A Purely Functional Package Manager

I was pointed at the Nix package manager by somebody a few weeks ago...

Quote said:

Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. It provides atomic upgrades and rollbacks, side-by-side installation of multiple versions of a package, multi-user package management and easy setup of build environments.

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It completely removes the possibility of version conflicts, allows for non-root package installation, and so on. It works across distributions, too - they have their own Linux distro, but you can also install just the package manager on any Linux/OSX system. More technical details in this paper.

I've just installed it on my desktop (openSUSE), and it works almost flawlessly - I've only had one package fail to build for me, and it was a rather old game. Figured it'd be something people here might be interested in trying out - certainly seems to me like it solves package management