This can also cause a build or install to fail with the following stack trace:
Traceback (most recent call last):
File "setup.py", line 452, in <module>
**setup_args
File "/usr/share/python2.7/distutils/core.py", line 152, in setup
File "/usr/share/python2.7/distutils/dist.py", line 953, in run_commands
File "/usr/share/python2.7/distutils/dist.py", line 972, in run_command
File "/home/users/aredridel/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/setuptools/command/develop.py", line 23, in run
self.old_run()
File "/home/users/aredridel/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/setuptools/command/develop.py", line 33, in old_run
self.install_for_development()
File "/home/users/aredridel/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/setuptools/command/develop.py", line 86, in install_for_development
self.run_command('egg_info')
File "/usr/share/python2.7/distutils/cmd.py", line 326, in run_command
File "/usr/share/python2.7/distutils/dist.py", line 972, in run_command
File "/home/users/aredridel/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/setuptools/command/egg_info.py", line 169, in run
writer = ep.load(installer=installer)
File "/home/users/aredridel/allmydata-tahoe-1.10.0/setuptools-0.6c16dev4.egg/pkg_resources.py", line 1981, in load
entry = __import__(self.module_name, globals(),globals(), ['__name__'])
ImportError: No module named core.utils.dist
#2216 was a duplicate.