Hi, Thanks for the report.
>> $ guix time-machine 8e7e414aa998fe8c0de8a491c91aab8b8d9c58f4 -- graph maven >> Updating channel 'guix' from Git repository at ' >> https://git.savannah.gnu.org/git/guix.git'... >> Computing Guix derivation for 'x86_64-linux'... Backtrace: [...] >> "453f18db343cbad1892186b85c7eb07f364b399e"; system: "x86_64-linux"; >> host version: "838347207cdd96de1ad0127aaf4b2c378c7c2148"; pull-version: 1). >> Please report it by email to <bug-guix@gnu.org>. As you can see, the host version 8383472… is consistent with: > $ guix describe > Generation 4 Feb 05 2021 19:10:35 (current) > guix 8383472 > repository URL: https://git.savannah.gnu.org/git/guix.git > branch: master > commit: 838347207cdd96de1ad0127aaf4b2c378c7c2148 but inconsistent with the “guix time-machine” command line. First “--commit=“ is missing and so I do not know how the command line is really parsed (I have to check). Second, I am not able to reproduce: --8<---------------cut here---------------start------------->8--- $ guix pull --commit=838347207cdd96de1ad0127aaf4b2c378c7c2148 $ guix describe Génération 11 07 févr. 2021 15:37:46 (actuelle) guix 8383472 URL du dépôt : https://git.savannah.gnu.org/git/guix.git branche : master commit : 838347207cdd96de1ad0127aaf4b2c378c7c2148 $ guix time-machine 8e7e414aa998fe8c0de8a491c91aab8b8d9c58f4 -- graph maven digraph "Guix package" { "140434164936448" [label = "maven@3.6.1", shape = box, fontname = sans]; "140434164936448" -> "140434165522592" [color = darkviolet]; "140434164936448" -> "140434165542176" [color = darkviolet]; "140434164936448" -> "140434164774944" [color = darkviolet]; "140434164936448" -> "140434164773024" [color = darkviolet]; "140434164936448" -> "140434164773184" [color = darkviolet]; "140434164936448" -> "140434164772864" [color = darkviolet]; "140434164936448" -> "140434164774624" [color = darkviolet]; "140434164936448" -> "140434164774784" [color = darkviolet]; … --8<---------------cut here---------------end--------------->8--- Maybe it is a bug in “guix machine” because it should raise an error. I will investigate. All the best, simon