{
  description = "FredOS NixOS configuration";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
    home-manager = {
      url = "github:nix-community/home-manager/release-26.05";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    zen-browser = {
      url = "github:0xc000022070/zen-browser-flake";
      inputs = {
        nixpkgs.follows = "nixpkgs";
        home-manager.follows = "home-manager";
      };
    };

    nix-cachyos-kernel.url = "github:xddxdd/nix-cachyos-kernel/release";

    proton-cachyos-nix.url = "github:powerofthe69/proton-cachyos-nix";

    stylix.url = "github:nix-community/stylix/release-26.05";
  };
  outputs =
    { self
    , nixpkgs
    , home-manager
    , zen-browser
    , nix-cachyos-kernel
    , stylix
    , proton-cachyos-nix
    , ...
    } @ inputs:
    let
      system = "x86_64-linux";
      mkHost = hostname: extraModules: nixpkgs.lib.nixosSystem {
        inherit system;
        specialArgs = { inherit inputs; };
        modules = [
          ./hosts/${hostname}.nix
          ./common.nix
          home-manager.nixosModules.home-manager
          stylix.nixosModules.stylix
          ./settings/stylix.nix
        ] ++ extraModules;
      };
    in
    {
      nixosConfigurations = {
        FredOS-Gaming      = mkHost "FredOS-Gaming"      [ ./hosts/hardware/FredOS-Gaming.nix ];
        FredOS-Mediaserver = mkHost "FredOS-Mediaserver" [ ./hosts/hardware/FredOS-Mediaserver.nix ];
        FredOS-Macbook     = mkHost "FredOS-Macbook"     [ ./hosts/hardware/FredOS-Macbook.nix ];
        FredOS-Kayla       = mkHost "FredOS-Kayla"       [ ./hosts/hardware/FredOS-Kayla.nix ];

        # Mediaserver's services on fake hardware, for testing from-scratch
        # bring-up (arr-interconnect especially) in a throwaway VM:
        #   nixos-rebuild build-vm --flake .#mediaserver-vm
        mediaserver-vm     = mkHost "FredOS-Mediaserver" [ ./hosts/hardware/vm.nix ];
      };
    };
}