{
  config,
  lib,
  pkgs,
  iosevkaCustom,
  ...
}:
{
  nix = {
    enable = true;
    settings = {
      cores = 0;
      max-jobs = "auto";
      trusted-users = [ "root" ];
      experimental-features = [
        "nix-command"
        "flakes"
      ];
      auto-optimise-store = true;
    };
    channel.enable = true;
    gc = {
      automatic = true;
      options = "--delete-older-than 7d";
    };
    optimise.automatic = true;
    registry.my-nixos = {
      from = {
        type = "indirect";
        id = "my-nixos";
      };
      to = {
        type = "git";
        url = "https://git.xenia.me.uk/pixelifytica/nixos.git?ref=main";
      };
    };
    extraOptions = ''
      keep-outputs = false
      keep-derivations = false
      min-free = ${toString (100 * 1024 * 1024)}
      max-free = ${toString (1024 * 1024 * 1024)}
    '';
  };
  nixpkgs.config.allowUnfree = true;
  system = {
    stateVersion = "23.05";
    autoUpgrade = {
      enable = true;
      persistent = true;
      allowReboot = false;
      flake = "git+${config.nix.registry.my-nixos.to.url}";
      dates = "02:00";
      randomizedDelaySec = "15min";
      flags = [
        "--accept-flake-config"
        "--option"
        "extra-binary-caches"
        "https://nix.xenia.me.uk"
      ];
    };
  };
  systemd.services = lib.mkIf config.system.autoUpgrade.enable {
    nixos-upgrade.serviceConfig = {
      CPUQuota = "75%";
      CPUWeight = 20;
      IOWeight = 20;
    };
  };
  boot.loader = {
    systemd-boot.enable = true;
    efi.canTouchEfiVariables = true;
  };
  networking = {
    networkmanager.enable = true;
    firewall.enable = true;
    nameservers = [ "9.9.9.9" ];
  };
  users.users.root.openssh.authorizedKeys.keys = [
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINI1dWlS16Keil0MGPWmMsBzx8F9ylfz+fRwxUr8/tZ/ ion"
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIC4M1zV3yLMMI1tYwdY9QDXJDlOBugm7UXKC+Xk89yHq pixelifytica@Vanguard"
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICPypUUGVAdpl0SHrUDVw0RureuFNsljrXQvrf0uc055 pixelifytica@Northstar"
  ];
  environment = {
    pathsToLink = [ "/share/zsh" ];
    sessionVariables = {
      XDG_CONFIG_HOME = "$HOME/.config";
      XDG_CACHE_HOME = "$HOME/.cache";
      XDG_DATA_HOME = "$HOME/.local/share";
      XDG_STATE_HOME = "$HOME/.local/state";
    };
    systemPackages = with pkgs; [
      coreutils-full
      gnumake
      git
      file
      zip
      unzip
      curl
      wget
      dig
      wireguard-tools
      quickemu
    ];
    localBinInPath = true;
  };
  programs = {
    command-not-found.enable = false;
    ssh.startAgent = true;
    nano = {
      enable = true;
      syntaxHighlight = true;
      nanorc = ''
        set nowrap
        set tabstospaces
        set tabsize 2
      '';
    };
  };
  services = {
    upower.enable = true;
    power-profiles-daemon.enable = true;
    system76-scheduler = {
      enable = true;
      useStockConfig = true;
    };
  };
  security.rtkit.enable = true;
  virtualisation.podman.enable = true;
  time.timeZone = "Europe/London";
  i18n.defaultLocale = "en_GB.UTF-8";
  console.useXkbConfig = true;
  fonts = {
    packages = [
      iosevkaCustom.packages.iosevka-custom-nerdfont
      iosevkaCustom.packages.iosevka-custom-aile
      pkgs.emacs-all-the-icons-fonts # Emacs
      pkgs.weather-icons # Emacs
      pkgs.lmodern # LaTeX
      pkgs.noto-fonts-emoji # Emoji
      (pkgs.nerdfonts.override { fonts = [ "NerdFontsSymbolsOnly" ]; })
    ];
    fontconfig = {
      enable = true;
      defaultFonts = with iosevkaCustom.names; {
        serif = [ iosevka-custom-aile ];
        sansSerif = [ iosevka-custom-aile ];
        monospace = [ iosevka-custom-nerdfont ];
        emoji = [ "Noto Color Emoji" ];
      };
    };
  };
}