Flakes
======

To use NixOS mailserver `Nix flakes`_, the following minimal ``flake.nix`` can
serve as an example to get started:

.. _Nix flakes: https://wiki.nixos.org/wiki/Flakes

.. literalinclude:: ./flakes.nix
   :language: nix


Lock the inputs and deploy the system closure:

.. code-block:: console

   nix flake lock
   nixos-rebuild --target-host root@mail.example.com --flake .#hostname switch