{
  ######
  inputs = {
    ######
    #nixpkgs-old.url = "github:NixOS/nixpkgs/nixos-24.05";

    # Main nix package repository
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";

    home-manager = {
      url = "github:nix-community/home-manager/release-24.11";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    # generating filesystems in different formats
    nixos-generators = {
      url = "github:nix-community/nixos-generators";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    # NixOS unstable channel
    nixos-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";

    # ready made hardware configurations. e.G.: Power saving
    nixos-hardware.url = "github:NixOS/nixos-hardware/master";

    # for managing flatpaks, like which ones are installed and which not
    nix-flatpak.url = "github:gmodena/nix-flatpak";
  };

  #######
  outputs =
    #######
    {
      self,
      nixpkgs,
      nixos-hardware,
      nixos-unstable,
      nix-flatpak,
      home-manager,
      nixos-generators,
      ...
    } @ inputs: let
      # Supported systems for your flake packages, shell, etc.
      systems = [
        #"aarch64-linux"
        "x86_64-linux"
      ];

      # This is a function that generates an attribute by calling a function you
      # pass to it, with each system as an argument
      forAllSystems = nixpkgs.lib.genAttrs systems;

      host_helper = hostname: {
        ${hostname} = nixpkgs.lib.nixosSystem {
          specialArgs = {inherit inputs;};
          modules = [
            ./hosts/${hostname}
          ];
        };
      };
    in {
      # Your custom packages
      # Accessible through 'nix build', 'nix shell', etc
      #packages = forAllSystems (system: import ./pkgs nixpkgs.legacyPackages.${system});

      # Formatter for your nix files, available through 'nix fmt'
      # Other options beside 'alejandra' include 'nixpkgs-fmt'
      formatter = forAllSystems (system: nixpkgs.legacyPackages.${system}.alejandra);

      # Your custom packages and modifications, exported as overlays
      overlays = import ./overlays {inherit inputs;};

      # Reusable nixos modules you might want to export
      # These are usually stuff you would upstream into nixpkgs
      #nixosModules = import ./modules/nixos;

      # NixOS configuration entrypoint
      # Available through 'nixos-rebuild --flake .#your-hostname'
      # to add more append // (host_helper example);
      nixosConfigurations =
        host_helper "crocoite" //
        host_helper "jitsi";

    };
}