Dear, The subsection 4.7.6 Replicating Guix [1] uses as example the commit d894ab8e9bfabcefa6c49d9ba2e834dd5a73a300.
Does the commit really exist? The checkouts cache had been deleted before calling "guix time-machine". rm -fr ~/.cache/guix/checkouts --8<---------------cut here---------------start------------->8--- guix time-machine --commit=d894ab8e9bfabcefa6c49d9ba2e834dd5a73a300 -- help Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'... guix time-machine: error: Git error: object not found - no match for id (d894ab8e9bfabcefa6c49d9ba2e834dd5a73a300) --8<---------------cut here---------------end--------------->8--- And note that: --8<---------------cut here---------------start------------->8--- cd ~/.cache/guix/checkouts/pjmkglp4t7znuugeurpurzikxq3tnlaywmisyr27shj7apsnalwq/ git show d894ab8e9bfabcefa6c49d9ba2e834dd5a73a300 fatal: bad object d894ab8e9bfabcefa6c49d9ba2e834dd5a73a300 --8<---------------cut here---------------end--------------->8--- Best regards, simon [1] https://guix.gnu.org/manual/en/html_node/Channels.html#Channels