[Nix-dev] Automatically locking the screen with xautolock

[Nikita Karetnikov]

How do I automatically lock the screen in NixOS?  I've installed
xautolock and slock.  And tested

  sudo xautolock -time 1 -locker slock

in the shell, which works fine.  Can I make it work without sudo?

It's a problem because these lines in configuration.nix:

    displayManager.sessionCommands =
      ''
      sudo xautolock -time 1 -locker slock &
      '';

result in

  sudo: no tty present and no askpass program specified

So it fails to start.
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