{
  config,
  pkgs,
  lib,
  username,
  inputs,
  ...
}:
{
  imports = [
    ./disk_yarn.nix
    ./common.nix
    ./impermanence.nix
    ./no-rgb.nix
    ./vr.nix

    inputs.impermanence.nixosModules.impermanence
    inputs.jovian-nixos.nixosModules.default
  ];

  fileSystems."/media/games" = {
    device = "/dev/disk/by-uuid/1878136e-765d-4784-b204-3536ab4fdac8";
    fsType = "f2fs";
    options = [ "nofail" ];
  };

  systemd.targets = {
    sleep.enable = false;
    suspend.enable = false;
    hibernate.enable = false;
    hybrid-sleep.enable = false;
  };

  networking.hostId = "abf570f9";

  # Static IP for consistent SSH access
  networking.networkmanager.ensureProfiles.profiles.enp7s0-static = {
    connection = {
      id = "enp7s0-static";
      type = "ethernet";
      interface-name = "enp7s0";
      autoconnect = true;
    };
    ipv4 = {
      method = "manual";
      address1 = "192.168.1.223/24,192.168.1.1";
      dns = "1.1.1.1;9.9.9.9;";
    };
    ipv6.method = "disabled";
  };

  services.openssh = {
    enable = true;
    ports = [ 22 ];
    settings = {
      PasswordAuthentication = false;
      PermitRootLogin = "yes";
    };
  };

  users.users.${username}.openssh.authorizedKeys.keys = [
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIO4jL6gYOunUlUtPvGdML0cpbKSsPNqQ1jit4E7U1RyH" # laptop
  ];

  users.users.root.openssh.authorizedKeys.keys = [
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIO4jL6gYOunUlUtPvGdML0cpbKSsPNqQ1jit4E7U1RyH" # laptop
  ];

  programs.steam = {
    remotePlay.openFirewall = true;
    localNetworkGameTransfers.openFirewall = true;
  };

  # LACT (Linux AMDGPU Configuration Tool): https://github.com/ilya-zlobintsev/LACT
  environment.systemPackages = with pkgs; [
    lact
  ];
  systemd.packages = with pkgs; [ lact ];
  systemd.services.lactd.wantedBy = [ "multi-user.target" ];

  systemd.services.lactd.serviceConfig.ExecStartPre = "${lib.getExe pkgs.bash} -c \"sleep 3s\"";

  nixpkgs.config.allowUnfreePredicate =
    pkg:
    builtins.elem (lib.getName pkg) [
      "steamdeck-hw-theme"
      "steam-jupiter-unwrapped"
      "steam"
      "steam-original"
      "steam-unwrapped"
      "steam-run"
    ];

  # Override jovian-stubs to disable steamos-update kernel check
  # This prevents Steam from requesting reboots for "system updates"
  # Steam client updates will still work normally
  nixpkgs.overlays = [
    (final: prev: {
      jovian-stubs = prev.stdenv.mkDerivation {
        name = "jovian-stubs-no-update";
        dontUnpack = true;
        installPhase = ''
          mkdir -p $out/bin

          # steamos-update: always report "no update available" (exit 7)
          # This disables the kernel mismatch check that triggers reboot prompts
          cat > $out/bin/steamos-update << 'STUB'
          #!/bin/sh
          >&2 echo "[JOVIAN] $0: stub called with: $* (system updates disabled)"
          exit 7
          STUB

          # steamos-reboot: reboot the system
          cat > $out/bin/steamos-reboot << 'STUB'
          #!/bin/sh
          >&2 echo "[JOVIAN] $0: stub called with: $*"
          systemctl reboot
          STUB

          # steamos-select-branch: no-op stub
          cat > $out/bin/steamos-select-branch << 'STUB'
          #!/bin/sh
          >&2 echo "[JOVIAN] $0: stub called with: $*"
          exit 0
          STUB

          # steamos-factory-reset-config: no-op stub
          cat > $out/bin/steamos-factory-reset-config << 'STUB'
          #!/bin/sh
          >&2 echo "[JOVIAN] $0: stub called with: $*"
          exit 0
          STUB

          # steamos-firmware-update: no-op stub
          cat > $out/bin/steamos-firmware-update << 'STUB'
          #!/bin/sh
          >&2 echo "[JOVIAN] $0: stub called with: $*"
          exit 0
          STUB

          # pkexec: pass through to real pkexec
          cat > $out/bin/pkexec << 'STUB'
          #!/bin/sh
          exec /run/wrappers/bin/pkexec "$@"
          STUB

          # sudo: pass through to doas
          cat > $out/bin/sudo << 'STUB'
          #!/bin/sh
          exec /run/wrappers/bin/doas "$@"
          STUB

          chmod 755 $out/bin/*
        '';
      };
    })
  ];

  jovian = {
    devices.steamdeck.enable = false;
    steam = {
      enable = true;
      autoStart = true;
      desktopSession = "niri";
      user = username;
    };
  };

  # Disable gamescope from common.nix to avoid conflict with jovian-nixos
  programs.gamescope.enable = lib.mkForce false;
}