Would you mind sharing how you set it up on a Kimsufi/OVH machine? All infos I have found were quite outdated and I haven't had enough time to dig into it myself yet. I think it would be great if someone would document this.
I could write it up on the wiki, but I've forgotten the finer details at this point. Basically, I followed the Linode instructions, using the Kimsufi rescue disk as a base. The problems that I ran into were that I had problems with the latest Nix tarball, so I used the latest release of Nix at the time instead[0] (probably a good idea anyway), and also that I needed to set up separate / and /boot partitions, as Nix wouldn't install when everything was on / for some reason (I think the Gentoo forums claim there's some issue with GRUB2 and ext4).
Not having KVM access is hell when you're trying to figure out why your system won't boot, btw.
Not having KVM access is hell when you're trying to figure out why your system won't boot, btw.
[0] http://hydra.nixos.org/build/6695701