From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jookia <166291@gmail.com>
Subject: Re: Updating Guix requires full rebuild?
Date: Sun, 31 Jan 2016 20:37:23 +1100
Message-ID: <20160131093723.GA21358@novena-choice-citizen.lan>
References: <20160130100642.GA31612@novena-choice-citizen.lan>
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On Sat, Jan 30, 2016 at 09:06:42PM +1100, Jookia wrote:
> Hey there,
> 
> I've been compiling and installing Guix without any substitutes, however I've
> hit a problem. I've managed to compile Guix, then compile Guix using Guix. But
> when I try to do anything using the Guix managed by Guix, it wants to rebuild
> everything on my system. I've uploaded some raw data,[1] comparing the outputs
> of the old and new Guix binaries and accompanying binaries as well as with and
> without the --bootstrap flag. The package being inspected is 'tar'.
> 
> It would seem like this is a major problem considering both Guix packages are
> identical aside from the host code having the Guix package derivation updated
> to use the same Git version as the host version of Guix. The tar packages aren't
> modified in any way and neither is any thing I would expect to be used to build
> a derivation, such as a builder script.
> 
> Cheers,
> Jookia.
> 
> [1]: uhoh.tar.bz2: https://infotomb.com/2dp3c

Following up: davexunit looked at this issue with me on IRC and showed me it's
to do with the Guix built from Git in Debian using /usr/local/var/guix while the
Guix installed using Guix used /var/guix - moving the files fixed everything.

Cheers,
Jookia.