def _get_win_folder_from_registry(csidl_name: str) -> str:
        """This is a fallback technique at best. I'm not sure if using the
        registry for this guarantees us the correct answer for all CSIDL_*
        names.
        """
        shell_folder_name = {
            "CSIDL_APPDATA": "AppData",
            "CSIDL_COMMON_APPDATA": "Common AppData",
            "CSIDL_LOCAL_APPDATA": "Local AppData",
        }[csidl_name]

        key = winreg.OpenKey(
            winreg.HKEY_CURRENT_USER,
            r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders",
        )
        dir, _ = winreg.QueryValueEx(key, shell_folder_name)
        return dir
This is a fallback technique at best. I'm not sure if using the
        registry for this guarantees us the correct answer for all CSIDL_*
        names.
        
install-pdm.py