.hgignore: Add .eggs/ and tarballcache/ Setuptools >= 7.0 and .eggs is created and populated with eggs if setup.py has setup_requires of packages that are not installed and setuptools has to download them to satisfy the requirements. See https://bitbucket.org/pypa/setuptools/pull-request/97/cache-eggs-required-for-building-in-eggs/diff# tarballcache comes from test.ini : archive_cache_dir = %(here)s/tarballcache