[Nix-dev] Re: May I remove the old python code?

[Michael Raskin]

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Peter Simons wrote:
> Maybe I'm just missing an obvious insight, but I don't understand how
> the wrapper code found in the new Python expression improves that
> situation, even if it's just for Python. Let's say I want to build
> "cheetahTemplate" with both Python 2.5 and Python 2.6. How is that
> supposed to be done?
> 
> My impression is that the recently added "override" feature is the way
> to go in that area.

If I understand anything, override is exactly not the answer to your
question (py 2.5+2.6). I tend to think that explicit composition + some
tricks preserves the possibility of simultaneous installation of
different versions (and any combinations). override is sometimes useful,
but proclaiming it to be a universal solution takes us further from our
brilliant goal - world without dependency conflicts.
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