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

From: [email-masked] (Ludovic Courtès)
Date: Wed, 01 Jul 2015 23:14:43 +0200

Eelco Dolstra <[email-masked]> 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.  ;-)

Thanks!

Ludo’.