{ lib, inputs, ... }:
{
  nix.settings.experimental-features = [ "nix-command" "flakes" "repl-flake" ];
  #nix.registry.self.flake = inputs.self;
  # Pin the rev to the revision of the public Nixpkgs that the system was built from.
  # This is the version which will be locked by flakes using flake:nixpkgs
  nix.registry.nixpkgs = {
    from = { id = "nixpkgs"; type = "indirect"; };
    to = {
      owner = "NixOS";
      repo = "nixpkgs";
      inherit (inputs.nixpkgs) rev;
      type = "github";
    };
  };
  nix.nixPath = [
    "nixpkgs=${inputs.nixpkgs}"
  ];

  systemd.services.nix-daemon.serviceConfig = {
    CPUSchedulingPolicy = lib.mkForce "batch";
    IOSchedulingClass = lib.mkForce "best-effort";
    # 0: high priority, 7: low priority
    IOSchedulingPriority = lib.mkForce 4;
    Nice = 0;
  };

  systemd.services.nix-gc.serviceConfig = {
    CPUSchedulingPolicy = "batch";
    IOSchedulingClass = "best-effort";
    IOSchedulingPriority = 7;
    Nice = 5;
  };

  systemd.sleep.extraConfig = ''
    AllowSuspend=no
    AllowHibernation=no
  '';
}