{ lib, pkgs, inputs, system, ... }:

{
  nix = {
    daemonCPUSchedPolicy = "idle";
    daemonIOSchedClass = "idle";
    daemonIOSchedPriority = 7;

    nixPath = [
      "nixpkgs=${inputs.nixpkgs}"
    ];

    settings = {
      experimental-features = [
        "nix-command"
        "flakes"
      ];
      trusted-users = [ "@wheel" ];
      auto-optimise-store = true;
      allowed-users = [ "@wheel" ];

      log-lines = lib.mkDefault 25;

      # Avoid disk full issues
      max-free = lib.mkDefault (3000 * 1024 * 1024);
      min-free = lib.mkDefault (512 * 1024 * 10);

      download-buffer-size = lib.mkDefault (512 * 1024 * 1024);
    };
    gc = {
      automatic = true;
      options = "--delete-older-than 30d";
      randomizedDelaySec = "60 min";
    };
  };

  systemd.services.nix-daemon.serviceConfig.OOMScoreAdjust = 250;

  nixpkgs.config.permittedInsecurePackages = [
    "olm-3.2.16"
  ];

  nixpkgs.overlays = [
    inputs.self.overlays.default
    (_: prev: {
      master = import inputs.nixpkgsMaster {
        inherit system;
        inherit (prev) config;
      };
    })
  ];

  environment.systemPackages = with pkgs; [
    cached-nix-shell
    git
  ];
}