{
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
    nixpkgs-stable.url = "nixpkgs/nixos-23.05";

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

  outputs =
    { self
    , nixpkgs
    , nixpkgs-stable
    , nixos-hardware
    , home-manager
    , impermanence
    }@inputs: {
      nixosConfigurations = {
        trantor = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          specialArgs = {
            # unstablePkgs = nixpkgs-unstable.legacyPackages."x86_64-linux";
            stablePkgs = nixpkgs-stable.legacyPackages."x86_64-linux";
            impermanence = impermanence;
          };

          modules = [
            ./hosts/trantor.nix
            home-manager.nixosModules.home-manager
            impermanence.nixosModules.impermanence
          ];
        };

        capibara = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          specialArgs = {
            # unstablePkgs = nixpkgs-unstable.legacyPackages."x86_64-linux";
            stablePkgs = nixpkgs-stable.legacyPackages."x86_64-linux";
            impermanence = impermanence;
          };

          modules = [
            ./hosts/capibara.nix
            nixos-hardware.nixosModules.lenovo-thinkpad-x230
            home-manager.nixosModules.home-manager
            impermanence.nixosModules.impermanence
          ];
        };

        lb = nixpkgs-stable.lib.nixosSystem {
          system = "aarch64-linux";
          specialArgs = { impermanence = impermanence; };
          modules = [
            ./hosts/lb.nix
            impermanence.nixosModules.impermanence
          ];
        };
      };
    };
}