Fix operation not permitted ?

python setup.py install
running install
running bdist_egg
running egg_info
creating line.egg-info
writing line.egg-info/PKG-INFO
writing dependency_links to line.egg-info/dependency_links.txt
writing requirements to line.egg-info/requires.txt
writing top-level names to line.egg-info/top_level.txt
writing manifest file 'line.egg-info/SOURCES.txt'
reading manifest file 'line.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'line.egg-info/SOURCES.txt'
installing library code to build/bdist.linux-aarch64/egg
running install_lib
running build_py
creating build
creating build/lib
creating build/lib/line
copying line/__init__.py -> build/lib/line
error: [Errno 1] Operation not permitted
$

Reproduce the issue with `python setup.py install` on the reported Linux aarch64 environment, starting with the output around `setup.py`, `build/lib`, and copying `line/__init__.py`. Inspect the installation context and determine why the copy fails with `Operation not permitted`; done means the package installs successfully without that error.

Written by the indexing model from the issue text.