[Nix-dev] PSA: basic NixOS installer

[Nikita Karetnikov]

I wrote a simple script for myself for installing on a UEFI machine.
Maybe someone will find it useful:

https://github.com/nkaretnikov/nixos-installer

The main idea is to allow you to boot with a minimal config, so you could
iterate on it, instead of dancing around with a flash drive in case you
mistype something.

Make sure to read the README.  And let me know if there are any issues.