From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nikita Karetnikov <nikita@karetnikov.org>
Subject: Re: guix-package --roll-back
Date: Mon, 21 Jan 2013 00:50:24 -0500
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To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@gnu.org>
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> I think we now have something that works well.

It doesn't work.

# ls -l /nix/var/nix/profiles/per-user/root/

[...]

guix-profile -> /nix/var/nix/profiles/per-user/root/guix-profile-16-link
guix-profile-15-link -> /nix/store/05gws0ijjf8bczrrsi8mrhh16xii0vis-user-environment
guix-profile-16-link -> /nix/store/aslx7hfjzkzjr73hbyk25997aap3avcb-user-environment

[...]

# ./pre-inst-env guix-package --roll-back
error: no previous profile; not rolling back

# ./pre-inst-env guix-package --roll-back
      -p /nix/var/nix/profiles/per-user/root/guix-profile
error: no previous profile; not rolling back

I'll try to investigate later.

Nikita

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