setup.py : circular import

[jihed-gasmi]

While installing libarchive I got the error :
Verifying that the library is accessible.Library can not be loaded: [WinError 126] Le module spécifié est introuvable.
I was surprised to discover that the line "import libarchive" is called within the file setup.py
I'm not aware of the reasons to change the name of the module but it's strange to import a module that you are trying to install or to install a module you are trying to import !