From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#23838: Guix on Debian 8.3 'guix system vm ...' -> "ERROR: qemu
	failed "qemu-system-x86_64"
Date: Fri, 24 Jun 2016 17:52:33 +0200
Message-ID: <87k2he37pa.fsf@gnu.org>
References: <86lh1ur8vr.fsf@gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Return-path: <bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:57444)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1bGTPm-0005VB-Lo
	for bug-guix@gnu.org; Fri, 24 Jun 2016 11:53:07 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1bGTPi-0004kC-B2
	for bug-guix@gnu.org; Fri, 24 Jun 2016 11:53:05 -0400
Received: from debbugs.gnu.org ([208.118.235.43]:42178)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1bGTPi-0004k8-7X
	for bug-guix@gnu.org; Fri, 24 Jun 2016 11:53:02 -0400
Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2)
	(envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1bGTPi-0006o0-35
	for bug-guix@gnu.org; Fri, 24 Jun 2016 11:53:02 -0400
Sender: "Debbugs-submit" <debbugs-submit-bounces@debbugs.gnu.org>
Resent-Message-ID: <handler.23838.B23838.146678356726130@debbugs.gnu.org>
In-Reply-To: <86lh1ur8vr.fsf@gmail.com> (myglc2@gmail.com's message of "Fri,
	24 Jun 2016 09:53:12 -0400")
List-Id: Bug reports for GNU Guix <bug-guix.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/bug-guix>,
	<mailto:bug-guix-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/bug-guix/>
List-Post: <mailto:bug-guix@gnu.org>
List-Help: <mailto:bug-guix-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/bug-guix>,
	<mailto:bug-guix-request@gnu.org?subject=subscribe>
Errors-To: bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org
Sender: "bug-Guix" <bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org>
To: myglc2 <myglc2@gmail.com>
Cc: 23838@debbugs.gnu.org

Hi!

myglc2 <myglc2@gmail.com> skribis:

> The following derivations will be built:
>    /gnu/store/jz6mlhlz7f5sp4g93spac69bxfjpjbqg-run-vm.sh.drv
>    /gnu/store/5f6zfsx0fa0bzkl4ynqb1lf5pk3m4rfs-qemu-image.drv
> warning: failed to install locale: Invalid argument
> building path(s) `/gnu/store/nbppjjb2kkb17nr8jqas7hchkg669nv9-qemu-image'
> Formatting 'image.qcow2', fmt=3Dqcow2 size=3D31457280 encryption=3Doff cl=
uster_size=3D65536 lazy_refcounts=3Doff refcount_bits=3D16
> Could not access KVM kernel module: Permission denied
> failed to initialize KVM: Permission denied

Please make sure the guixbuild* user accounts have write permission for
/dev/kvm.

Usually, /dev/kvm is has =E2=80=9Ckvm=E2=80=9D as its group and is group-wr=
itable.  So
all you need is to add the guixbuild* users to the =E2=80=9Ckvm=E2=80=9D gr=
oup.

The manual mentions this pitfall (info "(guix) Invoking guix system")
but I guess it=E2=80=99s easily missed.

Thanks,
Ludo=E2=80=99.