{
  description = "4th flake";
  inputs = {
    old-nixpkgs.url = "github:NixOS/nixpkgs/55d1f923c480dadce40f5231feb472e81b0bab48";
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
    home-manager.url = "github:nix-community/home-manager/release-26.05";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
    quickshell.url = "git+https://git.outfoxxed.me/outfoxxed/quickshell";
    quickshell.inputs.nixpkgs.follows = "nixpkgs";
    qml-niri.url = "github:imiric/qml-niri/main";
    qml-niri.inputs.nixpkgs.follows = "nixpkgs";
    qml-niri.inputs.quickshell.follows = "quickshell";
    nix-cachyos-kernel.url = "github:xddxdd/nix-cachyos-kernel/release";
  };

  outputs = { self, old-nixpkgs, nixpkgs, home-manager, ... }@inputs: {
    nixosConfigurations.unix = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      specialArgs = {
        inherit inputs;
      };
      modules = [
        ./configuration
        home-manager.nixosModules.home-manager
        ({ pkgs, ... }: {
          nixpkgs.overlays = [
            (final: prev: {
              xdg-desktop-portal =
                old-nixpkgs.legacyPackages.x86_64-linux.xdg-desktop-portal;
            })
            inputs.nix-cachyos-kernel.overlays.pinned
          ];

          home-manager.useGlobalPkgs = true;
          home-manager.useUserPackages = true;
          home-manager.users.coast =
            import ./home-configuration/default.nix;
          home-manager.backupFileExtension = "home-backup";
          home-manager.extraSpecialArgs = {
            inherit inputs;
          };
        })
      ];
    };
  };
}