From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Recovering from broken Guix due to GC'd derivations
Date: Sun, 10 Jun 2018 18:45:19 +0200
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In-Reply-To: <87vaarfli2.fsf@gnu.org> (Mike Gerwitz's message of "Sat, 09 Jun
	2018 22:01:09 -0400")
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To: Mike Gerwitz <mtg@gnu.org>
Cc: help-guix@gnu.org

Hello Mike,

Mike Gerwitz <mtg@gnu.org> skribis:

> Any pull or package install operations that I attempt give me an error
> like this (the exact derivation varies between my user and root, but
> they're both Perl):
>
>   guix pull: error: open-file: No such file or directory:
>   "/gnu/store/fq9583a3w3is0r1yrjxg1znfz2qkvg78-perl-5.26.2.tar.xz.drv"

This cannot happen under normal circumstances, as we say.  Could it be
that you run a Guix configured with a different =E2=80=98localstatedir=E2=
=80=99 than the
original one that populated /gnu/store?

Remember that the store consists of two elements: /gnu/store, and
$localstatedir/guix/db/db.sqlite (usually /var/guix/db/db.sqlite).  If
you somehow end up using a different database, it may be incorrect
compared to what=E2=80=99s actually available in /gnu/store (info "(guix) T=
he
Store").

For that reason, =E2=80=98configure=E2=80=99 tries hard to prevent you from=
 configuring
Guix with a =E2=80=98localstatedir=E2=80=99 different from the one of the
already-installed Guix (see =E2=80=98GUIX_CHECK_LOCALSTATEDIR=E2=80=99 in m=
4/guix.m4.)

HTH,
Ludo=E2=80=99.