Can be safely changed afterwards.
To make the necessary edits easier to find.
From: * https://gist.github.com/nh2/78d1c65e33806e7728622dbe748c2b6a * https://gist.github.com/nh2/ebc27311731f53ee623ae781ca25103f * https://gist.github.com/nh2/1d2c533085b514dc1a7719f6ff35640b * https://gist.github.com/nh2/c02612e05d1a0f5dc9fd50dda04b3e48 See https://discourse.nixos.org/t/howto-install-nixos-on-an-ovh-dedicated-server/3089.