[Nix-dev] Pinning nixpkgs on unstable channel: retention of cached packages

[Maarten Hoogendoorn]

Good to know. I expected that something like this would be the case.

The context is that I'm doing some performance benchmarks of kafka and
kafka running on top of mesos, and would like to have a 100% reproducible
setup that I can give to our client. I guess that in theory, I could export
the closures of the nixops machines and store them somewhere, but that's
probably overkill :)

Thanks!

2016-07-11 16:25 GMT+02:00 Eelco Dolstra <eelco.dolstra at logicblox.com>:

> Hi,
>
> On 07/11/2016 10:54 AM, Maarten Hoogendoorn wrote:
>
> > I was wondering if it's safe to depend on any commit in the unstable
> channel,
> > and still be able to fetch the derivations build by Hydra from the
> binary cache.
>
> No. Currently any version except the most recent of any channel may be
> garbage-collected at some point. Note that this also applies to the stable
> channels.
>
> --
> Eelco Dolstra | LogicBlox, Inc. | http://nixos.org/~eelco/
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