From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Craven <david@craven.ch>
Subject: Re: [PATCH 4/7] upstream: Use a the first url from urls when find2
	returns #f.
Date: Wed, 28 Sep 2016 17:19:28 +0200
Message-ID: <CAL1_immE-qt4wALyihF_X18xdAafTtzOYYfZwS4r6U-P4HFF5Q@mail.gmail.com>
References: <20160928151538.11679-1-david@craven.ch>
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To: guix-devel <guix-devel@gnu.org>, =?UTF-8?Q?Ludovic_Court=C3=A8s?= <ludo@gnu.org>

There is an example now. You can change the version of the rust-libc
package and then run guix refresh -u rust-libc on it.