in the directories mentioned in the `*module-dirs*' list. If the file is
found, then THUNK is invoked with two arguments: the name we used to find
it (which might be relative to the starting directory) and the truename
in the directories mentioned in the `*module-dirs*' list. If the file is
found, then THUNK is invoked with two arguments: the name we used to find
it (which might be relative to the starting directory) and the truename