[Nix-dev] break purity

[Oliver Charles]

Well you don't tie the knot in the expression itself. It's more that the
pre-existing artefacts are a function input, and a function output:

{ stdenv, gcc, etc, artefacts ? null }:
{
  preConfigure = "cp ${artefacts}/* .'';
  outputs = [ "out" "artefacts" ];
}

Then you would nix-build to produce binaries and an artefacts directory.
Subsequent nix-builds would then use nix-build --arg 'artefacts'
'./results-artefacts'.

Handwaving, but hopefully that helps clarify.
ocharles

On Fri, Apr 22, 2016 at 5:35 PM stewart mackenzie <setori88 at gmail.com>
wrote:

> Interesting Oliver, though this sounds like it'll throw a recursive
> error. I'll investigate! cheers!
>
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