/usr/lib/python2.7/dist-packages/bzrlib/plugins/ is in bzr-builder 0.7.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/__init__.py
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/backports.py
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/cmds.py
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/deb_util.py
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/deb_version.py
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/info.py
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/ppa.py
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/recipe.py
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/tests/
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/tests/__init__.py
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/tests/test_blackbox.py
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/tests/test_deb_util.py
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/tests/test_deb_version.py
/usr/lib/python2.7/dist-packages/bzrlib/plugins/builder/tests/test_recipe.py