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Thu, 25 Jan 2024 08:56:18 -0800 (PST) Received: from lili ([2a01:e0a:59b:9120:4e91:1e63:dc4:9dec]) by smtp.gmail.com with ESMTPSA id k10-20020a05600c1c8a00b0040e451fd602sm3155073wms.33.2024.01.25.08.56.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Jan 2024 08:56:17 -0800 (PST) From: Simon Tournier In-Reply-To: References: Date: Thu, 25 Jan 2024 15:18:34 +0100 Message-ID: <87msstqyx1.fsf@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: guix-patches@gnu.org List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-patches-bounces+larch=yhetil.org@gnu.org Sender: guix-patches-bounces+larch=yhetil.org@gnu.org X-Migadu-Flow: FLOW_IN X-Migadu-Country: US X-Migadu-Spam-Score: 4.68 X-Migadu-Queue-Id: E125F3C1A7 X-Spam-Score: 4.68 X-Migadu-Scanner: mx11.migadu.com X-TUID: gB98D0QLFY2Y Hi Ludo, On mar., 23 janv. 2024 at 17:46, Ludovic Court=C3=A8s wrote: > Lots of talk about reproducibility and how wonderful Guix is, but > as soon as you try to build packages from v1.0.0, released less > than 5 years ago, you hit a =E2=80=9Ctime trap=E2=80=9D in Python, in Ope= nSSL, or > some other ugly build failure=E2=80=94assuming you managed to fetch source > code in the first place=C2=B9. Cool! Workarounds for =E2=80=9Ctime trap=E2=80=9D of the current past. Note that today is the past of the future. ;-) Other said, the same workarounds will help to detect today thus fix the =E2=80=9Ctime trap=E2=80= =9D that would arise in the future. Without mentioning the bug of 2038 year. :-) > This patch series defines a long-overdue > =E2=80=98virtual-build-machine-service-type=E2=80=99: a service to run a = virtual > machine available for offloading. My main goal here is to > allow users to build stuff at a past date without having to > change their system clock. It can also be used to control other > aspects usually not under control: the CPU model, the Linux kernel. Yes, controlling CPU model and Linux kernel are worth: + CPU model because we already have examples of failures (Python 3.7 packaged in Guix v1.0.0, some BLAS libraries, etc.); + Linux kernel because its stability is one of the strong assumption we are making for reproducibility. Cheers, simon