pybuild and setup.py in unusual place

[PICCA Frederic-Emmanuel]

Hello, I have a packahe where the setup.py is not located at the root of the 
directory.

So I need to do 

override_dh_auto_XXX:
    dh_auto_XXX -- -d <dpath>

Is there a export somthing whcih allows to says where is the setup.py to deal 
with ?

thanks

Frederic