module/paths

    array
    boot.janet on line 2248, column 1

    The list of paths to look for modules, templated for
    module/expand-path. Each element is a two element tuple, containing the
    path template and a keyword :source, :native, or :image indicating how
    require should load files found at these paths.
    
    A tuple can also contain a third element, specifying a filter that
    prevents module/find from searching that path template if the filter
    doesn't match the input path. The filter can be a string or a predicate
    function, and is often a file extension, including the period.