How to use the home manager module

My nixos flake use home manager as a module. Config:

{ 
     home-manager.useGlobalPkgs = true;
          home-manager.useUserPackages = true; 

          home-manager.users.karm2 = import ./home.nix;

 }

After struggling for a long time I still couldn't figure out where to add the imports to import the module walker.homeManagerModules.walker. I don't know how to avoid the error "the option home does not exist". My flake:

{
  description = "A simple NixOS flake";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable-small";
    nixos-hardware.url = "github:NixOS/nixos-hardware/master";
    aagl.url = "github:ezKEa/aagl-gtk-on-nix";
    aagl.inputs.nixpkgs.follows = "nixpkgs";
    walker.url = "github:abenz1267/walker";
    fenix = {
      url = "github:nix-community/fenix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    lanzaboote = {
      url = "github:nix-community/lanzaboote/v0.3.0";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    home-manager = {
    #   url = "github:nix-community/home-manager/master";
    #   # The `follows` keyword in inputs is used for inheritance.
    #   # Here, `inputs.nixpkgs` of home-manager is kept consistent with
    #   # the `inputs.nixpkgs` of the current flake,
    #   # to avoid problems caused by different versions of nixpkgs.
      inputs.nixpkgs.follows = "nixpkgs";
    }; 
  };

  outputs = { self, nixpkgs, nixos-hardware, aagl, fenix, lanzaboote, home-manager, walker, ... }@inputs: {
    packages.x86_64-linux.default = fenix.packages.x86_64-linux.minimal.toolchain;
    nixosConfigurations.MKZFRMW = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      modules = [ 
    {
     imports = [ aagl.nixosModules.default ];
          nix.settings = aagl.nixConfig; # Set up Cachix
          programs.anime-game-launcher.enable = true; # Adds launcher and /etc/hosts rules
          programs.honkers-railway-launcher.enable = true;
        }
        ./configuration.nix
    ./flatpak-fix.nix
    nixos-hardware.nixosModules.framework-13-7040-amd

    lanzaboote.nixosModules.lanzaboote

    ({ pkgs, lib, ... }: {

            environment.systemPackages = [
              # For debugging and troubleshooting Secure Boot.
              pkgs.sbctl
            ];

            # Lanzaboote currently replaces the systemd-boot module.
            # This setting is usually set to true in configuration.nix
            # generated at installation time. So we force it to false
            # for now.
            boot.loader.systemd-boot.enable = lib.mkForce false;

            boot.lanzaboote = {
              enable = true;
              pkiBundle = "/etc/secureboot";
            };
        })
    ({ pkgs, ... }: {
          nixpkgs.overlays = [ fenix.overlays.default ];
          environment.systemPackages = with pkgs; [
            (fenix.packages.${system}.complete.withComponents [
              "cargo"
              "clippy"
              "rust-src"
              "rustc"
              "rustfmt"
            ])
            rust-analyzer-nightly
          ];
        }) 
    home-manager.nixosModules.home-manager
        { 
     home-manager.useGlobalPkgs = true;
          home-manager.useUserPackages = true; 
          home-manager.users.karm2 = import ./home.nix;
        }
      ];
    };
  };
}

abenz1267 / walker

How to use the home manager module #32