bug/question: How to access `src` when `flake.nix` inside subfolder in Git repo.

[gabyx]

The library is great, but I ran into some trouble
when I have the following structure:

repo-dir/
    tools/nix/
      - shells/default/default.nix
      - flake.nix
     config/file.txt

I configure snowfall in repo-dir/tools/nix/flake.nix like this but I have no way to access the root of the repository:

outputs =
    inputs:
    let
      rootPath = ../..;
      lib = inputs.snowfall-lib.mkLib {
        inherit inputs;
        src = rootPath;

        snowfall = {
          root = rootPath + "/tools/nix";
        };
      };
    in
    lib.mkFlake { };

Question: How do I load a file in tools/nix/shells/default/default.nix which is located in repo-dir/config/file.txt?
I tried lib.snowfall.fs.get-file ../../config/file.txtwhich does not work. How do I access some file which is inside thesrcconfig above, namelysrc = ../..==/repo-dir`?

P.S: Maybe snowfall should internaly use lib.filesets which provides a better way to access

[gabyx]

I could only get it to work when baking the path to a store path with "${rootPath}".

      rootPath = ../..;
      lib = inputs.snowfall-lib.mkLib {
        inherit inputs;
        # The `src` must be the root of the flake.
        src = "${rootPath}";

        snowfall = {
          root = "${rootPath}" + "/tools/nix";
          namespace = "repository";
          meta = {
            name = "repository-template";
            title = "Repository Template";
          };
        };
      };

with

{pkgs}: 
let
   file = ./../../config/file.txt;
in
pkgs.mkShell {
...
}

But I am unsure why this is? Do you know?