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I noticed yesterday that trying to rebuild tox in nova fails because it 
won't pull down the oslo alpha packages (config, messaging, rootwrap).

It looks like you need the --pre option with pip install to get these 
normally.

Also sounds like tox should already be doing --pre, but it doesn't 
appear to be with at least tox 1.6.1 in site-packages.

I'm using pip 1.5.6 which I thought was the latest.
-- 

Thanks,

Matt Riedemann