On my WinXP PC I have the following file structure: C:\FOO\setup.py C:\FOO\Bar\BarConstants.py C:\FOO\Bar\Bar.py The contents of \FOO\setup.py are as follows: setup(name="FOO", version="4.2.3", package_dir={"FOO.Bar" : "Bar"}, packages=["FOO.Bar"], author="C. Martin Taylor", author_email="cmtaylor@ti.com" ) When I run this setup.py to build a "bdist" I get the following output: C:\FOO>python setup.py bdist --format=zip running bdist running bdist_dumb running build running build_py package init file 'Bar\__init__.py' not found (or not a regular file) package init file 'Bar\__init__.py' not found (or not a regular file) installing to build\bdist.win32\dumb running install running install_lib creating build\bdist.win32\dumb creating build\bdist.win32\dumb\Python24 creating build\bdist.win32\dumb\Python24\Lib creating build\bdist.win32\dumb\Python24\Lib\site-packages copying build\lib\BarConstants.py -> build\bdist.win32\dumb\Python24\Lib\site-packages creating build\bdist.win32\dumb\Python24\Lib\site-packages\Bar copying build\lib\Bar\BarConstants.py -> build\bdist.win32\dumb\Python24\Lib\site-packages\Bar copying build\lib\Bar\Bar.py -> build\bdist.win32\dumb\Python24\Lib\site-packages\Bar copying build\lib\Bar.py -> build\bdist.win32\dumb\Python24\Lib\site-packages creating build\bdist.win32\dumb\Python24\Lib\site-packages\FOO creating build\bdist.win32\dumb\Python24\Lib\site-packages\FOO\Bar copying build\lib\FOO\Bar\BarConstants.py -> build\bdist.win32\dumb\Python24\Lib\site-packages\FOO\Bar copying build\lib\FOO\Bar\Bar.py -> build\bdist.win32\dumb\Python24\Lib\site-packages\FOO\Bar byte-compiling build\bdist.win32\dumb\Python24\Lib\site-packages\BarConstants.py to BarConstants.pyc byte-compiling build\bdist.win32\dumb\Python24\Lib\site-packages\Bar\GUIConstants.py to BarConstants.pyc byte-compiling build\bdist.win32\dumb\Python24\Lib\site-packages\Bar\Bar.py to Bar.pyc byte-compiling build\bdist.win32\dumb\Python24\Lib\site-packages\Bar.py to GUITest.pyc byte-compiling build\bdist.win32\dumb\Python24\Lib\site-packages\FOO\Bar\BarConstants.p y to BarConstants.pyc byte-compiling build\bdist.win32\dumb\Python24\Lib\site-packages\FOO\Bar\Bar.py to Bar.pyc creating 'C:\FOO\dist\FOO-4.2.3.win32.zip' and adding '.' to it adding 'Python24\Lib\site-packages\BarConstants.py' adding 'Python24\Lib\site-packages\BarConstants.pyc' adding 'Python24\Lib\site-packages\Bar.py' adding 'Python24\Lib\site-packages\Bar.pyc' adding 'Python24\Lib\site-packages\Bar\BarConstants.py' adding 'Python24\Lib\site-packages\Bar\BarConstants.pyc' adding 'Python24\Lib\site-packages\Bar\Bar.py' adding 'Python24\Lib\site-packages\Bar\Bar.pyc' adding 'Python24\Lib\site-packages\FOO\Bar\BarConstants.py' adding 'Python24\Lib\site-packages\FOO\Bar\BarConstants.pyc' adding 'Python24\Lib\site-packages\FOO\Bar\Bar.py' adding 'Python24\Lib\site-packages\FOO\Bar\Bar.pyc' removing 'build\bdist.win32\dumb' (and everything under it) My question is why am I getting 3 copies of the 2 Python files I'm trying to distribute, one copy in \Python24\Lib\site-packages\, one in \Python24\Lib\site-packages\Bar\ and one in \Python24\Lib\site-packages\FOO\Bar\? The only copy I want is the last one! This is my first attempt at using Distutils so any help and explanations would be appreciated. (I really don't want to make FOO.Bar into a "real" Python package with an __init__.py module, so please don't suggest that.) Thank you, Martin Taylor