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[Gustavo Niemeyer]

> So at least AIUI what Tom is comparing with isn't VM's *specifically*
> but 'here is my OS, its a stable platform, and without nuking down to
> fresh-installed state, please get a new version of Launchpad running
> on it'.

That's be doable with "ensemble upgrade-formula launchpad", which is
already in place:

    https://ensemble.ubuntu.com/docs/formula-upgrades.html

For now it will upgrade all service units at once, but it should be
trivial to tweak this behavior to something else.

-- 
Gustavo Niemeyer
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