[Nix-dev] break purity

[Aycan iRiCAN]

This is a clever optimization. Thank you Oliver.

--
aycan

> On 22 Apr 2016, at 21:33, Oliver Charles <ollie at ocharles.org.uk> wrote:
> 
> It's certainly possible, because I just did it with Haskell ;)
> 
> https://gist.github.com/ocharles/cbd5d7ce63bb570abb86e655f36435ab
> 
>> On Fri, Apr 22, 2016 at 7:16 PM stewart mackenzie <setori88 at gmail.com> wrote:
>> Yeah, I'm not so sure it's possible because one cannot copy from a
>> precompiled derivation output to a new derivation output, ie copy
>> cross derivation.
>> 
>> As these multiple outputs (outputs = [x y z]) are seen as different
>> derivations, this cannot happen right?
>> 
>> Have you actually managed to make progress beyond the copying part of
>> your example (preConfigure = "cp ${artefacts}/* .'';) in your
>> experimentation?
>> 
>> (I'm still thought experimenting)
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