Fail to import module via github url

[jnnr]

Describe the bug
As of now, grid-builder cannot be imported into another Snakemake workflow by pointing to the github url.

To Reproduce
Steps to reproduce the behavior:

1. Import the module into a Snakemake workflow.

configfile: "config/modules/grid_builder.yaml"


module module_grid_builder:
    pathvars:
        logs="results/module_grid_builder/logs",
        resources="results/module_grid_builder/resources",
        results="results/module_grid_builder/results",
    snakefile:
        github(
            "pypsa/grid-builder",
            path="workflow/Snakefile",
            tag="6905b99",
        )
    config:
        config["grid_builder"]


use rule * from module_grid_builder as module_grid_builder_*

rule all_grid_builder:
    default_target: True
    input:
        rules.module_grid_builder_retrieve_osm_all.input,

2. Request something from the module

pixi run snakemake -c 2 all_grid_builder

4. See error

ImportError in file "https://raw.githubusercontent.com/pypsa/grid-builder/6905b99/workflow/Snakefile", line 8:
cannot import name 'load_region_configs' from 'scripts._schema'
  File "https://raw.githubusercontent.com/pypsa/grid-builder/6905b99/workflow/Snakefile", line 8, in <module>

Expected behavior
The reference to scripts._schema should be correctly resolved.

Desktop (please complete the following information):

• OS: Linux Fedora 43