[Nix-dev] hermetically sealed nixpkgs

[Roger Qiu]

Once you've downloaded all the sources, if you ever need to rebuild on a 
different machine, you can reference these already downloaded sources, 
amiright? In effect, you've created own local mirror.

On 15/12/2015 10:07 PM, Domen Kožar wrote:
> see https://nixos.org/wiki/Download_all_sources
>
> On Tue, Dec 15, 2015 at 11:59 AM, Roger Qiu <roger.qiu at polycademy.com 
> <mailto:roger.qiu at polycademy.com>> wrote:
>
>     Would you rather freeze the dependencies as part of whatever
>     you're building, or have a persistent mirror (IPFS) of all
>     packages that Nix ever makes available?
>
>
>     On 7/12/2015 3:44 PM, Chris Forno wrote:
>>     How would you go about (pre)fetching every source in the nixpkgs
>>     tree? How large would you estimate the result to be (number of
>>     archives/space on disk)?
>>
>>     In the last couple days:
>>
>>     * GNU bash silently updated patch 42
>>     (https://github.com/NixOS/nixpkgs/issues/11475)
>>     * OpenSSL moved the 1.0.2d release to the "old" directory
>>     (breaking the URL)
>>     (https://github.com/NixOS/nixpkgs/commit/51a5f49d700890a93c36dd50e5eca4bf6ee6966b)
>>
>>     These kind of breakages introduced by the external world erode
>>     the promise of Nix that attracted me as a developer: reproducible
>>     builds into the future. In this respect alone, Nix + a fixed
>>     nixpkgs checkout provides little/no advantage over building in a
>>     VM: both work indefinitely as long as you don't introduce new
>>     dependencies.
>>
>>     I intend to build/test a sort of hermetically sealed Nix where
>>     all dependencies are frozen in time (saved somewhere). I suspect
>>     I'm not alone in wanting this
>>     (http://permalink.gmane.org/gmane.linux.distributions.nixos/18611).
>>     I'd appreciate any tips/guidance/references to related work
>>     before I begin.
>>
>>
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>
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