The Home Manager module should be able to install packages from nixpkgs.
pkgs

The Home Manager module should be able to install packages from nixpkgs.

use pkgs

Well I'd like to pass some things to the flake and this is what I came up with:

{
  description = "Custom Flake";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
    myvendor-scripts.url = "git+https://git.myvendor.de/linux/scripts";
  };

  outputs = { nixpkgs, nixpkgs-unstable, myvendor-scripts, ... }: let
    getModule = {system, flakefolder}: let
      homeManagerModule = import ./modules {
        lib = nixpkgs.lib;
        pkgs = nixpkgs.legacyPackages.${system};
        pkgs-unstable = nixpkgs-unstable.legacyPackages.${system};
        flakefolder = flakefolder;
        myvendor-scripts = myvendor-scripts;
      };
    in {
      home-manager = homeManagerModule ;
    };
  in {
    getModule = getModule;
  };
}

But this way I have to define everything a would need - like lib, config, etc. Doesn't seem to be a good solution. Am I missing something?

Well I'd like to pass some things to the flake and this is what I came up with:

{
  description = "Custom Flake";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
    myvendor-scripts.url = "git+https://git.myvendor.de/linux/scripts";
  };

  outputs = { nixpkgs, nixpkgs-unstable, myvendor-scripts, ... }: let
    getModule = {system, flakefolder}: let
      homeManagerModule = import ./modules {
        lib = nixpkgs.lib;
        pkgs = nixpkgs.legacyPackages.${system};
        pkgs-unstable = nixpkgs-unstable.legacyPackages.${system};
        flakefolder = flakefolder;
        myvendor-scripts = myvendor-scripts;
      };
    in {
      home-manager = homeManagerModule ;
    };
  in {
    getModule = getModule;
  };
}

But this way I have to define everything a module would need - like lib, config, etc. Doesn't seem to be a good solution. Am I missing something?

when you have something like in a "consuming flake"

      homeConfigurations.dram = home-manager.lib.homeManagerConfiguration {
        ...
        modules = [
          foo
          bar
          ./home.nix
        ];
      };

all three modules are on equal footing, they can each have options and config, and any one module can set the values of options defined in any module

when you have something like in a "consuming flake"

      homeConfigurations.dram = home-manager.lib.homeManagerConfiguration {
        ...
        modules = [
          foo
          bar
          ./home.nix
        ];
      };

all three modules are on equal footing, they can each have options and config, and any module can set the values of options defined in any module

you would have something like

{ config, lib, ... }:

{
  options = {
    my-scripts.flakefolder = lib.mkOption {
      type = with lib.types; types.str;
      description = "The flake folder for my-scripts";
    };
  };

  config = {
    home.packages = [
      (something config.my-scripts.flakefolder)
    ];
  };
}

and then in your regular module you would set

  my-scripts.flakefolder = "git+file:///home/whatever/you-get-the-idea";

So that would result in something like this?

  outputs = { nixpkgs, nixpkgs-unstable, myvendor-scripts, ... }: let
    getModule = {system}: let
      homeManagerModule = import ./modules {
        inherit myvendor-scripts;
        pkgs = nixpkgs.legacyPackages.${system};
        pkgs-unstable = nixpkgs-unstable.legacyPackages.${system};
      };
    in {
      home-manager = homeManagerModule ;
    };
  in {
    getModule = getModule;
  };

config and lib can't be used in submodules then.