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.

I have a bunch of eg.

    inputs.patch-arsenik = {
      url = "https://patch-diff.githubusercontent.com/raw/NixOS/nixpkgs/pull/386205.patch";
      flake = false;
    };

in the flake for my systems, applied with patchedNixpkgs = inputs.nixpkgs.legacyPackages.x86_64-linux.applyPatches { src = inputs.nixpkgs; patches = [ inputs.patch-arsenik ]; };, for some of my PRs I want in my pkgs but are not merged. This allow to have up-to-date patches with low effort.

But recently, github rate limits have been hitting me on like 100% of my nix flake update. Anybody has a workaround ?

I have a bunch of eg.

    inputs.patch-arsenik = {
      url = "https://patch-diff.githubusercontent.com/raw/NixOS/nixpkgs/pull/386205.patch";
      flake = false;
    };

in the flake for my systems, applied with patchedNixpkgs = inputs.nixpkgs.legacyPackages.x86_64-linux.applyPatches { src = inputs.nixpkgs; patches = [ inputs.patch-arsenik ]; };, for some PRs I want in my pkgs but are not merged. This allow to have up-to-date patches with low effort.

But recently, github rate limits have been hitting me on like 100% of my nix flake update. Anybody has a workaround ?

In reply to @gsaurel:laas.fr
If I could set an access token on githubusercontent, it would work (eg. as in curl "https://patch-diff.githubusercontent.com/raw/NixOS/nixpkgs/pull/386205.patch?access_token=$GITHUB_TOKEN"), but I have no idea how to configure that without exposing the token directly in my flake.nix, which is a public file