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bug#18747: [PATCH] Distinguish between “offloadability” and “substitutab

From: Ludovic Courtès
Subject: bug#18747: [PATCH] Distinguish between “offloadability” and “substitutability”
Date: Wed, 01 Jul 2015 23:14:43 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

Eelco Dolstra <address@hidden> skribis:

> On 01/07/15 17:21, Ludovic Courtès wrote:
>> Nix commit 55586527 (June 2013) changed the semantics of
>> ‘preferLocalBuild’ from “avoid offloading this derivation” to “avoid
>> offloading *or substituting* this derivation” (see
>> <http://bugs.gnu.org/18747>.)
>> This patch introduces a new special key, ‘substitution’, to specify
>> whether a derivation should be substituted.  ‘preferLocalBuild’ is kept,
>> but its initial semantics is restored.
> Have you seen
> https://github.com/NixOS/nix/commit/b64988bb3585478676585a0f0aecbcf4e11d4432,
> which essentially does the same thing?

I hadn’t, but that’s perfect–we’re on the same page.  ;-)



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