From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Hinsen <konrad.hinsen@fastmail.net>
Subject: Re: Checking for substitutes
Date: Tue, 5 Jun 2018 20:33:34 +0200
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To: Ricardo Wurmus <rekado@elephly.net>, Timothy Sample <samplet@ngyro.com>, help-guix@gnu.org

Hi Ricardo,

>> I tried it. It provides interesting statistics, but always considers all
>> packages in Guix rather than just the ones I care about.
> 
> You can pass a manifest to “guix weather”.

Found it in the manual - great! And a quick look at the source shows 
that it shouldn't be too hard to make it print a list of the packages 
that are not available as substitutes. It's on my to-do list...

Thanks,
   Konrad.