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From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Problems running 'check-system'
Date: Mon, 08 May 2017 16:20:01 +0200
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In-Reply-To: <87r2zzc1jz.fsf@gmail.com> (Chris Marusich's message of "Sun, 07
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To: Chris Marusich <cmmarusich@gmail.com>
Cc: guix-devel@gnu.org

Hi Chris,

Chris Marusich <cmmarusich@gmail.com> skribis:

> I think I might have finally found the reason.  When I remove the
> "--pure" from the invocation, the "installed-os" test runs successfully
> on my GuixSD machine.  It seems that, for some reason, "--pure" was the
> cause of the failure.  That's surprising to me, since my expectation was
> that Guix's tests should work just fine in a pure environment.  Could
> this be a bug?

When using =E2=80=98--pure=E2=80=99, there=E2=80=99s no =E2=80=98git=E2=80=
=99 command in $PATH.  So my guess
would be that this changes the content of (current-guix), which uses
=E2=80=98git-predicate=E2=80=99.

In particular, your =E2=80=98current-guix=E2=80=99 package ends up including
guile-2.0.9.tar.xz file, because it cannot determine that it=E2=80=99s not =
under
version control, and then the build process of the =E2=80=98guix=E2=80=99 p=
ackage fails
because this file already exists and is read-only.

QED!  :-)

That=E2=80=99s a limitation of =E2=80=98git-predicate=E2=80=99 in its curre=
nt form.  Eventually
we=E2=80=99ll require =E2=80=98guile-git=E2=80=99 and we won=E2=80=99t have=
 that problem.

In the meantime, the workaround is to add Git to your environment:

  guix environment guix --ad-hoc git --pure

Thanks for debugging it, and I HTH!

Ludo=E2=80=99.