From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Craven <david@craven.ch>
Subject: Re: [PATCH 4/4] environment: Add '--debug' flag.
Date: Tue, 19 Jul 2016 21:02:58 +0200
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To: Tobias Geerinckx-Rice <me@tobias.gr>
Cc: guix-devel <guix-devel@gnu.org>, Guix-devel <guix-devel-bounces+me=tobias.gr@gnu.org>

> 1. I'd like to use overlay fs (like docker) and create a new overlay
> for each phase to easily revert a phase.

I think this might also help to debug build reproducibility issues, by
finding out which phase is introducing them. (Or is it always
obvious?)

I wasn't trying to complain, but I think there is some room for
improvement here...