From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Thompson Subject: Re: Dates set to Dec 31 1969 Date: Sat, 27 Sep 2014 09:30:50 -0400 Message-ID: <87bnq1nqb9.fsf@izanagi.i-did-not-set--mail-host-address--so-tickle-me> References: <20140927130912.GK4704@n0nb.us> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:36861) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XXs5e-0004Mt-Ui for guix-devel@gnu.org; Sat, 27 Sep 2014 09:31:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XXs5Y-0003G7-Kv for guix-devel@gnu.org; Sat, 27 Sep 2014 09:31:10 -0400 Received: from na3sys009aog121.obsmtp.com ([74.125.149.145]:42400) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XXs5Y-0003FV-E6 for guix-devel@gnu.org; Sat, 27 Sep 2014 09:31:04 -0400 Received: by mail-qa0-f43.google.com with SMTP id i13so7162912qae.16 for ; Sat, 27 Sep 2014 06:30:52 -0700 (PDT) In-Reply-To: <20140927130912.GK4704@n0nb.us> List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org To: Nate Bargmann , guix-devel Nate Bargmann writes: > As much as I'd like to be six years old again in some aspects, I'm > curious why most of the dates under /gnu/store and under ~/.guix-profile > are set to Dec 31 1969? Yes, I know that this is just before the > beginning of the Unix epoch, which must figure into the equation in some > way. > > If this is in the FM, I apologize for the noise as I haven't completed > the manual yet. > This is by design in order to have more deterministic builds. If two files have the same contents but have different timestamps, then they will have different hashes. -- David Thompson Web Developer - Free Software Foundation - http://fsf.org GPG Key: 0FF1D807 Support the FSF: https://fsf.org/donate