[Nix-dev] Accessing files in derivations.

[Vladimír Čunát]

On 04/19/2016 04:01 PM, Layus wrote:
> That operator would ensure that the path exists in the derivation, but 
> also look up through the outputs to find one containing that file.

Unfortunately, during evaluation you can't access the results of builds
to check whether some path exists. (Well, technically you can, but we
avoid it, as it has nasty consequences.)

--Vladimir


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