A few guidelines to not make people run away when talking about Nix. We use Nix and love it, so we want to talk about it with people to whom it could be useful: our community has grown enough to demonstrate that some people can and have been convinced. However, most of the time, those people were interested enough by the few keywords on http://nixos.org to take the time to give a damn. I've practiced talking about Nix to my friends who don't care at all, and would like to share my findings.