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While waiting some inordinate amount of time to compile lxml for a 
tempest pep8 test, I started to wonder why is it that we are using -U on 
all our pip install commands in tox (it's a pretty common pattern across 
projects).

It seems like requirements should be sufficient. Forcing -U to the 
latest all the time seems like it would actually mask a ton of problems, 
and makes sitepackages = True to be largely useless.

I'm sure it went in for a reason, so I'd love to understand the reason, 
to make sure that my instinct in disabling it in Tempest doesn't have a 
ton of side effects.

	-Sean

-- 
Sean Dague
Samsung Research America
sean at dague.net / sean.dague at samsung.com
http://dague.net