Re, 

Here are all the commands in order, I redid everything because I did a reboot 
in between and needed to redefine the variables. 

--8<---------------cut here---------------start------------->8--- 
$ guix time-machine -C channels.scm 
/home/tmathieu/.cache/guix/inferiors/elqniarazslbnlsqgu5nzml2vwde7yks6hrdogagjslnewegsksq
 

$ inferior=$(guix time-machine -C channels.scm) 

$ guix gc --referrers $inferior 
/gnu/store/0y5pd6dyzh2bf0xghp35pnhhpzp6fl39-fonts-dir.drv 
/gnu/store/3gk1ws5cd7lzsszb5rj7j4nf0z6z1pm2-fonts-dir.drv 
/gnu/store/7zmlq7qmywdl24s105br56hj569cfwwl-info-dir.drv 
/gnu/store/9g6y370dkbqyyw0lyikzn2q8skrrkfl3-info-dir.drv 
/gnu/store/9m9qslk48lv5pa36hk9n46xxnz3yw2jz-profile.drv 
/gnu/store/hj26a084miccwi8aqv9d5y69knhjf9bj-profile 
/gnu/store/hn1y38cm14s3symhqa6gwsx9ncc49x62-ca-certificate-bundle.drv 
/gnu/store/knk5z194masymyhca9g9qwq8j2x50kbz-emacs-subdirs.drv 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/pg632gs7n6nfdysajxkg4238g7341myl-ca-certificate-bundle.drv 
/gnu/store/pq8fd6pawkb5w96nk2wkdknh9m943ass-profile.drv 
/gnu/store/r9imsxsryg3lsh52p8f7bjrzp5hx154i-profile 
/gnu/store/x61l4cvp38mp179cafnlb4hh1mz7y3ds-emacs-subdirs.drv 

$ guix gc --derivers $inferior 
/gnu/store/kckbcpwfjpa9agidjl7ihg8fawr1yy8w-profile.drv 

$ profile=$(guix gc --referrers $inferior) 

$ guix gc --references 
/gnu/store/h73qvv7iljwk2fsz84q282jmr02jfg8y-fonts-dir.drv 
/gnu/store/8y97gfl4rzjmizfswx34hs36w66aa96g-mkfontdir-1.0.7.drv 
/gnu/store/9fypczkl6mnii90mgwaanil5g6226gbf-module-import 
/gnu/store/9nbpljaijxd5615sjnz8s2jspw8jw9a0-mkfontscale-1.2.3.drv 
/gnu/store/bz83qk3mjwifn7ib6wpkid0v9l9hdgrg-guile-3.0.9.drv 
/gnu/store/f6bcnz9p2i82y8cckk5k60j9622hhd69-fonts-dir-builder 
/gnu/store/in35p1g3s6fvbxk83j7s9y4yj6gbykca-guix-science.drv 
/gnu/store/mz26n1377c6s9vz860vps2hj21rcayfz-module-import-compiled.drv 
/gnu/store/zx2cd0cmgli0qjid6x8q2w081mzzn7jz-guix-52d82e555.drv 

$ guix gc --list-live | grep 0y5pd6dyzh2bf0xghp35pnhhpzp6fl39-fonts-dir.drv 
finding garbage collector roots... 
determining live/dead paths... 
/gnu/store/0y5pd6dyzh2bf0xghp35pnhhpzp6fl39-fonts-dir.drv 

$ guix gc --list-dead | grep 0y5pd6dyzh2bf0xghp35pnhhpzp6fl39-fonts-dir.drv 
finding garbage collector roots... 
determining live/dead paths... 

$ guix time-machine -C channels.scm 
/home/tmathieu/.cache/guix/inferiors/elqniarazslbnlsqgu5nzml2vwde7yks6hrdogagjslnewegsksq
 

$ guix gc --references \ 
$(guix gc --referrers \ 
$(guix time-machine -C channels.scm)) 
/gnu/store/5zad9v0icvp9l9iadfyxwcycik43x8pm-guile-bytestructures-1.0.10.drv 
/gnu/store/6a152xj4s049kpj8cznqpkpgsliywm1v-guile-git-0.10.0.drv 
/gnu/store/aw0l7krkw907v90a2kvdb28zgl6xfnfg-guile-json-4.7.3.drv 
/gnu/store/awx748fic82s8y374rcwlywfxjhinp3k-guile-lib-0.2.8.1.drv 
/gnu/store/c89fcgp6x4mi986bnlmnjprzwm8miwq3-guile-avahi-0.4.1.drv 
/gnu/store/d74g479b3i85lmqh4bxdiy4vdbcl3d4r-emacs-subdirs-builder 
/gnu/store/ds3pgg1hrhzpc8a16kn3jrv65jbbzj25-guile-gnutls-4.0.0.drv 
/gnu/store/f8wknmqwqhf7phfxfvd06p6j4s9d9f9s-guile-lzlib-0.3.0.drv 
/gnu/store/fi52rbfy78nnxxzdi2njd1a1g5lavbn9-guile-zlib-0.2.2.drv 
/gnu/store/gc7id7acy37m0m8rv5065k6v27bgplwb-guile-gcrypt-0.4.0.drv 
/gnu/store/i2xjiazsw6w6sasi6512mpg2vhkgcc64-guile-zstd-0.1.1.drv 
/gnu/store/i6wlkbw665qv5zspzgr338hk0gq4wqmw-module-import 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/q5vs629x4k6wqqr5r7s47lk0bxrbw9mz-guix-1.4.0-37.096dedd.drv 
/gnu/store/sv84m1a4ii2nhk6qfn8vkb06cgigrn5j-guile-ssh-0.18.0.drv 
/gnu/store/v6qfi0ni8vsnairxijbbsfgc1rhxgzf1-guile-sqlite3-0.1.3.drv 
/gnu/store/w743nnyv96h2sam8z31rx5vjrlnw3c4f-guile-3.0.9.drv 
/gnu/store/whqbrq4090xm5j4vvdzqvgfbzpsax3x2-module-import-compiled.drv 
/gnu/store/ylbxll2lv660b27jmd1jivq9b8k1wbj1-guile-semver-0.1.1.drv 
/gnu/store/1myi8hwa0a3lf9qw14dkqckhv9ljpzp1-guile-bytestructures-1.0.10 
/gnu/store/1vlys9drlv0r2py1fjrzixiiv1l4c04k-info-dir 
/gnu/store/21a7l75zz5nv50bl2j6p763plh625bm1-emacs-subdirs 
/gnu/store/5b3smkq3ra0i4baybaylxi7kgc34pfaw-guile-lzlib-0.3.0 
/gnu/store/711y2zrpg0ygxaghy72v8hzwla7mjaqg-guile-json-4.7.3 
/gnu/store/87alzbb2h3n5a55s68gvjarqx0d4q3k8-guile-gcrypt-0.4.0 
/gnu/store/984khzsm5hh1qk6jx7glr8zxgqww1p2r-guile-zlib-0.2.2 
/gnu/store/b1g8f5lj7xgvj50ns98i03w54jjqp28x-guix-1.4.0-37.096dedd 
/gnu/store/b818sn41swmzbxmbscvfqqfbqzapl86b-guile-ssh-0.18.0 
/gnu/store/czbr8pwpcpvfs4w0x7pmx4n1z6ni5sdz-guile-lib-0.2.8.1 
/gnu/store/fh45amc11qadp0ip62snxpm5x8lcrs5d-guile-avahi-0.4.1 
/gnu/store/fjn1zy1hp882ss7k76w2jv7ma3r3d99v-guile-sqlite3-0.1.3 
/gnu/store/nj1051ag55p7llr1wc0ml6hg08gk1prs-guile-semver-0.1.1 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/p02qvjbcvchlbrirqijlk3pp36j5pksa-guile-git-0.10.0 
/gnu/store/r9imsxsryg3lsh52p8f7bjrzp5hx154i-profile 
/gnu/store/s84sqlx75i28wfpl6z97aqfj6fsqlypz-guile-gnutls-4.0.0 
/gnu/store/y3wv71q20nyrzl0hdxpfmflr0hjzm44m-guile-zstd-0.1.1 
/gnu/store/3gk1ws5cd7lzsszb5rj7j4nf0z6z1pm2-fonts-dir.drv 
/gnu/store/432l98hgmb058w6knagywdrpkhcf8rvm-profile-builder 
/gnu/store/5zad9v0icvp9l9iadfyxwcycik43x8pm-guile-bytestructures-1.0.10.drv 
/gnu/store/6a152xj4s049kpj8cznqpkpgsliywm1v-guile-git-0.10.0.drv 
/gnu/store/7zmlq7qmywdl24s105br56hj569cfwwl-info-dir.drv 
/gnu/store/aw0l7krkw907v90a2kvdb28zgl6xfnfg-guile-json-4.7.3.drv 
/gnu/store/awx748fic82s8y374rcwlywfxjhinp3k-guile-lib-0.2.8.1.drv 
/gnu/store/c89fcgp6x4mi986bnlmnjprzwm8miwq3-guile-avahi-0.4.1.drv 
/gnu/store/ds3pgg1hrhzpc8a16kn3jrv65jbbzj25-guile-gnutls-4.0.0.drv 
/gnu/store/f8wknmqwqhf7phfxfvd06p6j4s9d9f9s-guile-lzlib-0.3.0.drv 
/gnu/store/fi52rbfy78nnxxzdi2njd1a1g5lavbn9-guile-zlib-0.2.2.drv 
/gnu/store/gc7id7acy37m0m8rv5065k6v27bgplwb-guile-gcrypt-0.4.0.drv 
/gnu/store/hn1y38cm14s3symhqa6gwsx9ncc49x62-ca-certificate-bundle.drv 
/gnu/store/i2xjiazsw6w6sasi6512mpg2vhkgcc64-guile-zstd-0.1.1.drv 
/gnu/store/i6wlkbw665qv5zspzgr338hk0gq4wqmw-module-import 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/q5vs629x4k6wqqr5r7s47lk0bxrbw9mz-guix-1.4.0-37.096dedd.drv 
/gnu/store/sv84m1a4ii2nhk6qfn8vkb06cgigrn5j-guile-ssh-0.18.0.drv 
/gnu/store/v6qfi0ni8vsnairxijbbsfgc1rhxgzf1-guile-sqlite3-0.1.3.drv 
/gnu/store/w743nnyv96h2sam8z31rx5vjrlnw3c4f-guile-3.0.9.drv 
/gnu/store/whqbrq4090xm5j4vvdzqvgfbzpsax3x2-module-import-compiled.drv 
/gnu/store/x61l4cvp38mp179cafnlb4hh1mz7y3ds-emacs-subdirs.drv 
/gnu/store/ylbxll2lv660b27jmd1jivq9b8k1wbj1-guile-semver-0.1.1.drv 
/gnu/store/5zad9v0icvp9l9iadfyxwcycik43x8pm-guile-bytestructures-1.0.10.drv 
/gnu/store/6a152xj4s049kpj8cznqpkpgsliywm1v-guile-git-0.10.0.drv 
/gnu/store/7lywwwrpf7aghlg516csz9pab8vfc8qa-module-import-compiled.drv 
/gnu/store/aw0l7krkw907v90a2kvdb28zgl6xfnfg-guile-json-4.7.3.drv 
/gnu/store/awx748fic82s8y374rcwlywfxjhinp3k-guile-lib-0.2.8.1.drv 
/gnu/store/c46aml8br46jc2c9mlv1ysm7j2zjf6wq-ca-certificate-bundle-builder 
/gnu/store/c89fcgp6x4mi986bnlmnjprzwm8miwq3-guile-avahi-0.4.1.drv 
/gnu/store/ds3pgg1hrhzpc8a16kn3jrv65jbbzj25-guile-gnutls-4.0.0.drv 
/gnu/store/f8wknmqwqhf7phfxfvd06p6j4s9d9f9s-guile-lzlib-0.3.0.drv 
/gnu/store/fi52rbfy78nnxxzdi2njd1a1g5lavbn9-guile-zlib-0.2.2.drv 
/gnu/store/gc7id7acy37m0m8rv5065k6v27bgplwb-guile-gcrypt-0.4.0.drv 
/gnu/store/i2xjiazsw6w6sasi6512mpg2vhkgcc64-guile-zstd-0.1.1.drv 
/gnu/store/jsxgc979x79h81kzqz9n6cpf5pk4z262-module-import 
/gnu/store/k2vq741cnhcqwx0lcs883fa3d8dz03zm-bash-5.1.16.drv 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/q5vs629x4k6wqqr5r7s47lk0bxrbw9mz-guix-1.4.0-37.096dedd.drv 
/gnu/store/sv84m1a4ii2nhk6qfn8vkb06cgigrn5j-guile-ssh-0.18.0.drv 
/gnu/store/v6qfi0ni8vsnairxijbbsfgc1rhxgzf1-guile-sqlite3-0.1.3.drv 
/gnu/store/w743nnyv96h2sam8z31rx5vjrlnw3c4f-guile-3.0.9.drv 
/gnu/store/ylbxll2lv660b27jmd1jivq9b8k1wbj1-guile-semver-0.1.1.drv 
/gnu/store/30j7azqpy63m251nr887g748w18cki6r-guix-science 
/gnu/store/asljmlgl7c2lw710vvv7n490i5lnw0xk-info-dir 
/gnu/store/mzdzf2fqzafx25vwssgpwpjp6x9ga3br-emacs-subdirs 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/nxg5z5g7fh1c5vcrzv6d53xnaxxxnz2v-guix-52d82e555 
/gnu/store/wpdq87d6azndvb94cfigsfbh2ph7j9aj-guix-package-cache 
/gnu/store/5zad9v0icvp9l9iadfyxwcycik43x8pm-guile-bytestructures-1.0.10.drv 
/gnu/store/6a152xj4s049kpj8cznqpkpgsliywm1v-guile-git-0.10.0.drv 
/gnu/store/acz17dvx59y4na0jvrdy6cim3wxhfix6-emacs-subdirs-builder 
/gnu/store/aw0l7krkw907v90a2kvdb28zgl6xfnfg-guile-json-4.7.3.drv 
/gnu/store/awx748fic82s8y374rcwlywfxjhinp3k-guile-lib-0.2.8.1.drv 
/gnu/store/c89fcgp6x4mi986bnlmnjprzwm8miwq3-guile-avahi-0.4.1.drv 
/gnu/store/ds3pgg1hrhzpc8a16kn3jrv65jbbzj25-guile-gnutls-4.0.0.drv 
/gnu/store/f8wknmqwqhf7phfxfvd06p6j4s9d9f9s-guile-lzlib-0.3.0.drv 
/gnu/store/fi52rbfy78nnxxzdi2njd1a1g5lavbn9-guile-zlib-0.2.2.drv 
/gnu/store/gc7id7acy37m0m8rv5065k6v27bgplwb-guile-gcrypt-0.4.0.drv 
/gnu/store/i2xjiazsw6w6sasi6512mpg2vhkgcc64-guile-zstd-0.1.1.drv 
/gnu/store/i6wlkbw665qv5zspzgr338hk0gq4wqmw-module-import 
/gnu/store/k2vq741cnhcqwx0lcs883fa3d8dz03zm-bash-5.1.16.drv 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/q5vs629x4k6wqqr5r7s47lk0bxrbw9mz-guix-1.4.0-37.096dedd.drv 
/gnu/store/sv84m1a4ii2nhk6qfn8vkb06cgigrn5j-guile-ssh-0.18.0.drv 
/gnu/store/v6qfi0ni8vsnairxijbbsfgc1rhxgzf1-guile-sqlite3-0.1.3.drv 
/gnu/store/w743nnyv96h2sam8z31rx5vjrlnw3c4f-guile-3.0.9.drv 
/gnu/store/whqbrq4090xm5j4vvdzqvgfbzpsax3x2-module-import-compiled.drv 
/gnu/store/ylbxll2lv660b27jmd1jivq9b8k1wbj1-guile-semver-0.1.1.drv 
/gnu/store/5zad9v0icvp9l9iadfyxwcycik43x8pm-guile-bytestructures-1.0.10.drv 
/gnu/store/6a152xj4s049kpj8cznqpkpgsliywm1v-guile-git-0.10.0.drv 
/gnu/store/7lywwwrpf7aghlg516csz9pab8vfc8qa-module-import-compiled.drv 
/gnu/store/aw0l7krkw907v90a2kvdb28zgl6xfnfg-guile-json-4.7.3.drv 
/gnu/store/awx748fic82s8y374rcwlywfxjhinp3k-guile-lib-0.2.8.1.drv 
/gnu/store/c89fcgp6x4mi986bnlmnjprzwm8miwq3-guile-avahi-0.4.1.drv 
/gnu/store/ds3pgg1hrhzpc8a16kn3jrv65jbbzj25-guile-gnutls-4.0.0.drv 
/gnu/store/f8wknmqwqhf7phfxfvd06p6j4s9d9f9s-guile-lzlib-0.3.0.drv 
/gnu/store/fi52rbfy78nnxxzdi2njd1a1g5lavbn9-guile-zlib-0.2.2.drv 
/gnu/store/gc7id7acy37m0m8rv5065k6v27bgplwb-guile-gcrypt-0.4.0.drv 
/gnu/store/i2xjiazsw6w6sasi6512mpg2vhkgcc64-guile-zstd-0.1.1.drv 
/gnu/store/jsxgc979x79h81kzqz9n6cpf5pk4z262-module-import 
/gnu/store/m8nvx55dkaphsispjqqmdwf059n0nv4v-ca-certificate-bundle-builder 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/q5vs629x4k6wqqr5r7s47lk0bxrbw9mz-guix-1.4.0-37.096dedd.drv 
/gnu/store/sv84m1a4ii2nhk6qfn8vkb06cgigrn5j-guile-ssh-0.18.0.drv 
/gnu/store/v6qfi0ni8vsnairxijbbsfgc1rhxgzf1-guile-sqlite3-0.1.3.drv 
/gnu/store/w743nnyv96h2sam8z31rx5vjrlnw3c4f-guile-3.0.9.drv 
/gnu/store/ylbxll2lv660b27jmd1jivq9b8k1wbj1-guile-semver-0.1.1.drv 
/gnu/store/1myi8hwa0a3lf9qw14dkqckhv9ljpzp1-guile-bytestructures-1.0.10 
/gnu/store/5b3smkq3ra0i4baybaylxi7kgc34pfaw-guile-lzlib-0.3.0 
/gnu/store/711y2zrpg0ygxaghy72v8hzwla7mjaqg-guile-json-4.7.3 
/gnu/store/87alzbb2h3n5a55s68gvjarqx0d4q3k8-guile-gcrypt-0.4.0 
/gnu/store/984khzsm5hh1qk6jx7glr8zxgqww1p2r-guile-zlib-0.2.2 
/gnu/store/99v2byzq7idvq8h7g7986qz116m07yfz-info-dir 
/gnu/store/b1g8f5lj7xgvj50ns98i03w54jjqp28x-guix-1.4.0-37.096dedd 
/gnu/store/b818sn41swmzbxmbscvfqqfbqzapl86b-guile-ssh-0.18.0 
/gnu/store/czbr8pwpcpvfs4w0x7pmx4n1z6ni5sdz-guile-lib-0.2.8.1 
/gnu/store/fh45amc11qadp0ip62snxpm5x8lcrs5d-guile-avahi-0.4.1 
/gnu/store/fjn1zy1hp882ss7k76w2jv7ma3r3d99v-guile-sqlite3-0.1.3 
/gnu/store/hj26a084miccwi8aqv9d5y69knhjf9bj-profile 
/gnu/store/jhixhskn6dd1zdndaqf32g2accsfglr3-emacs-subdirs 
/gnu/store/myz4fqrv5xnbbbps4nbzqyngcyyysrsl-bash-5.1.16 
/gnu/store/nj1051ag55p7llr1wc0ml6hg08gk1prs-guile-semver-0.1.1 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/p02qvjbcvchlbrirqijlk3pp36j5pksa-guile-git-0.10.0 
/gnu/store/s84sqlx75i28wfpl6z97aqfj6fsqlypz-guile-gnutls-4.0.0 
/gnu/store/y3wv71q20nyrzl0hdxpfmflr0hjzm44m-guile-zstd-0.1.1 
/gnu/store/0y5pd6dyzh2bf0xghp35pnhhpzp6fl39-fonts-dir.drv 
/gnu/store/5zad9v0icvp9l9iadfyxwcycik43x8pm-guile-bytestructures-1.0.10.drv 
/gnu/store/6a152xj4s049kpj8cznqpkpgsliywm1v-guile-git-0.10.0.drv 
/gnu/store/9g6y370dkbqyyw0lyikzn2q8skrrkfl3-info-dir.drv 
/gnu/store/aw0l7krkw907v90a2kvdb28zgl6xfnfg-guile-json-4.7.3.drv 
/gnu/store/awx748fic82s8y374rcwlywfxjhinp3k-guile-lib-0.2.8.1.drv 
/gnu/store/axics2896pg50zkllnxbzay5hy69pzdj-profile-builder 
/gnu/store/c89fcgp6x4mi986bnlmnjprzwm8miwq3-guile-avahi-0.4.1.drv 
/gnu/store/ds3pgg1hrhzpc8a16kn3jrv65jbbzj25-guile-gnutls-4.0.0.drv 
/gnu/store/f8wknmqwqhf7phfxfvd06p6j4s9d9f9s-guile-lzlib-0.3.0.drv 
/gnu/store/fi52rbfy78nnxxzdi2njd1a1g5lavbn9-guile-zlib-0.2.2.drv 
/gnu/store/gc7id7acy37m0m8rv5065k6v27bgplwb-guile-gcrypt-0.4.0.drv 
/gnu/store/i2xjiazsw6w6sasi6512mpg2vhkgcc64-guile-zstd-0.1.1.drv 
/gnu/store/i6wlkbw665qv5zspzgr338hk0gq4wqmw-module-import 
/gnu/store/k2vq741cnhcqwx0lcs883fa3d8dz03zm-bash-5.1.16.drv 
/gnu/store/knk5z194masymyhca9g9qwq8j2x50kbz-emacs-subdirs.drv 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/pg632gs7n6nfdysajxkg4238g7341myl-ca-certificate-bundle.drv 
/gnu/store/q5vs629x4k6wqqr5r7s47lk0bxrbw9mz-guix-1.4.0-37.096dedd.drv 
/gnu/store/sv84m1a4ii2nhk6qfn8vkb06cgigrn5j-guile-ssh-0.18.0.drv 
/gnu/store/v6qfi0ni8vsnairxijbbsfgc1rhxgzf1-guile-sqlite3-0.1.3.drv 
/gnu/store/w743nnyv96h2sam8z31rx5vjrlnw3c4f-guile-3.0.9.drv 
/gnu/store/whqbrq4090xm5j4vvdzqvgfbzpsax3x2-module-import-compiled.drv 
/gnu/store/ylbxll2lv660b27jmd1jivq9b8k1wbj1-guile-semver-0.1.1.drv 
/gnu/store/5zad9v0icvp9l9iadfyxwcycik43x8pm-guile-bytestructures-1.0.10.drv 
/gnu/store/6a152xj4s049kpj8cznqpkpgsliywm1v-guile-git-0.10.0.drv 
/gnu/store/7lywwwrpf7aghlg516csz9pab8vfc8qa-module-import-compiled.drv 
/gnu/store/aw0l7krkw907v90a2kvdb28zgl6xfnfg-guile-json-4.7.3.drv 
/gnu/store/awx748fic82s8y374rcwlywfxjhinp3k-guile-lib-0.2.8.1.drv 
/gnu/store/c2mqid5d2pvisvw1lbhxy9qxg09174zb-texinfo-6.8.drv 
/gnu/store/c89fcgp6x4mi986bnlmnjprzwm8miwq3-guile-avahi-0.4.1.drv 
/gnu/store/dlmrgz59ypdzp2i89z6xm5vvmqcaivv8-gzip-1.13.drv 
/gnu/store/ds3pgg1hrhzpc8a16kn3jrv65jbbzj25-guile-gnutls-4.0.0.drv 
/gnu/store/f8wknmqwqhf7phfxfvd06p6j4s9d9f9s-guile-lzlib-0.3.0.drv 
/gnu/store/fi52rbfy78nnxxzdi2njd1a1g5lavbn9-guile-zlib-0.2.2.drv 
/gnu/store/gc7id7acy37m0m8rv5065k6v27bgplwb-guile-gcrypt-0.4.0.drv 
/gnu/store/i2xjiazsw6w6sasi6512mpg2vhkgcc64-guile-zstd-0.1.1.drv 
/gnu/store/jsxgc979x79h81kzqz9n6cpf5pk4z262-module-import 
/gnu/store/k2vq741cnhcqwx0lcs883fa3d8dz03zm-bash-5.1.16.drv 
/gnu/store/k8sad6lq9hrbag2rmd4idd1h8xv7q6rb-info-dir-builder 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/prpd62ahra08bb5yac063i2gz7bqabya-glibc-utf8-locales-2.39.drv 
/gnu/store/q5vs629x4k6wqqr5r7s47lk0bxrbw9mz-guix-1.4.0-37.096dedd.drv 
/gnu/store/sv84m1a4ii2nhk6qfn8vkb06cgigrn5j-guile-ssh-0.18.0.drv 
/gnu/store/v6qfi0ni8vsnairxijbbsfgc1rhxgzf1-guile-sqlite3-0.1.3.drv 
/gnu/store/w743nnyv96h2sam8z31rx5vjrlnw3c4f-guile-3.0.9.drv 
/gnu/store/ylbxll2lv660b27jmd1jivq9b8k1wbj1-guile-semver-0.1.1.drv 
/gnu/store/5zad9v0icvp9l9iadfyxwcycik43x8pm-guile-bytestructures-1.0.10.drv 
/gnu/store/6a152xj4s049kpj8cznqpkpgsliywm1v-guile-git-0.10.0.drv 
/gnu/store/7lywwwrpf7aghlg516csz9pab8vfc8qa-module-import-compiled.drv 
/gnu/store/aw0l7krkw907v90a2kvdb28zgl6xfnfg-guile-json-4.7.3.drv 
/gnu/store/awx748fic82s8y374rcwlywfxjhinp3k-guile-lib-0.2.8.1.drv 
/gnu/store/c2mqid5d2pvisvw1lbhxy9qxg09174zb-texinfo-6.8.drv 
/gnu/store/c89fcgp6x4mi986bnlmnjprzwm8miwq3-guile-avahi-0.4.1.drv 
/gnu/store/dlmrgz59ypdzp2i89z6xm5vvmqcaivv8-gzip-1.13.drv 
/gnu/store/ds3pgg1hrhzpc8a16kn3jrv65jbbzj25-guile-gnutls-4.0.0.drv 
/gnu/store/f8wknmqwqhf7phfxfvd06p6j4s9d9f9s-guile-lzlib-0.3.0.drv 
/gnu/store/fi52rbfy78nnxxzdi2njd1a1g5lavbn9-guile-zlib-0.2.2.drv 
/gnu/store/gc7id7acy37m0m8rv5065k6v27bgplwb-guile-gcrypt-0.4.0.drv 
/gnu/store/i2xjiazsw6w6sasi6512mpg2vhkgcc64-guile-zstd-0.1.1.drv 
/gnu/store/jsxgc979x79h81kzqz9n6cpf5pk4z262-module-import 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/prpd62ahra08bb5yac063i2gz7bqabya-glibc-utf8-locales-2.39.drv 
/gnu/store/q5vs629x4k6wqqr5r7s47lk0bxrbw9mz-guix-1.4.0-37.096dedd.drv 
/gnu/store/sv84m1a4ii2nhk6qfn8vkb06cgigrn5j-guile-ssh-0.18.0.drv 
/gnu/store/v6qfi0ni8vsnairxijbbsfgc1rhxgzf1-guile-sqlite3-0.1.3.drv 
/gnu/store/vjw33kdsjjymvfil9nfqrjjnsbsw0nvs-info-dir-builder 
/gnu/store/w743nnyv96h2sam8z31rx5vjrlnw3c4f-guile-3.0.9.drv 
/gnu/store/ylbxll2lv660b27jmd1jivq9b8k1wbj1-guile-semver-0.1.1.drv 
/gnu/store/00qyqmgaikrkwzwqp39f49qsd59n5117-module-import-compiled.drv 
/gnu/store/34y4da493fni8iinh63zg7k6s8nfiqcy-fonts-dir-builder 
/gnu/store/5zad9v0icvp9l9iadfyxwcycik43x8pm-guile-bytestructures-1.0.10.drv 
/gnu/store/6a152xj4s049kpj8cznqpkpgsliywm1v-guile-git-0.10.0.drv 
/gnu/store/aw0l7krkw907v90a2kvdb28zgl6xfnfg-guile-json-4.7.3.drv 
/gnu/store/awx748fic82s8y374rcwlywfxjhinp3k-guile-lib-0.2.8.1.drv 
/gnu/store/c89fcgp6x4mi986bnlmnjprzwm8miwq3-guile-avahi-0.4.1.drv 
/gnu/store/csiaz72fbcixzngpa5b16i6lbkd5agda-mkfontscale-1.2.3.drv 
/gnu/store/ds3pgg1hrhzpc8a16kn3jrv65jbbzj25-guile-gnutls-4.0.0.drv 
/gnu/store/f8wknmqwqhf7phfxfvd06p6j4s9d9f9s-guile-lzlib-0.3.0.drv 
/gnu/store/fi52rbfy78nnxxzdi2njd1a1g5lavbn9-guile-zlib-0.2.2.drv 
/gnu/store/gc7id7acy37m0m8rv5065k6v27bgplwb-guile-gcrypt-0.4.0.drv 
/gnu/store/i2xjiazsw6w6sasi6512mpg2vhkgcc64-guile-zstd-0.1.1.drv 
/gnu/store/iy671i667gzzk3qmjqbcik123jyvbw5k-module-import 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/q5vs629x4k6wqqr5r7s47lk0bxrbw9mz-guix-1.4.0-37.096dedd.drv 
/gnu/store/qjvgm41g12w22lrq90pc6w5hb2xglgcf-mkfontdir-1.0.7.drv 
/gnu/store/sv84m1a4ii2nhk6qfn8vkb06cgigrn5j-guile-ssh-0.18.0.drv 
/gnu/store/v6qfi0ni8vsnairxijbbsfgc1rhxgzf1-guile-sqlite3-0.1.3.drv 
/gnu/store/w743nnyv96h2sam8z31rx5vjrlnw3c4f-guile-3.0.9.drv 
/gnu/store/ylbxll2lv660b27jmd1jivq9b8k1wbj1-guile-semver-0.1.1.drv 
/gnu/store/00qyqmgaikrkwzwqp39f49qsd59n5117-module-import-compiled.drv 
/gnu/store/5zad9v0icvp9l9iadfyxwcycik43x8pm-guile-bytestructures-1.0.10.drv 
/gnu/store/6a152xj4s049kpj8cznqpkpgsliywm1v-guile-git-0.10.0.drv 
/gnu/store/aw0l7krkw907v90a2kvdb28zgl6xfnfg-guile-json-4.7.3.drv 
/gnu/store/awx748fic82s8y374rcwlywfxjhinp3k-guile-lib-0.2.8.1.drv 
/gnu/store/bmvrrq2zlh655vsib19fdxgk17xy9ajm-fonts-dir-builder 
/gnu/store/c89fcgp6x4mi986bnlmnjprzwm8miwq3-guile-avahi-0.4.1.drv 
/gnu/store/csiaz72fbcixzngpa5b16i6lbkd5agda-mkfontscale-1.2.3.drv 
/gnu/store/ds3pgg1hrhzpc8a16kn3jrv65jbbzj25-guile-gnutls-4.0.0.drv 
/gnu/store/f8wknmqwqhf7phfxfvd06p6j4s9d9f9s-guile-lzlib-0.3.0.drv 
/gnu/store/fi52rbfy78nnxxzdi2njd1a1g5lavbn9-guile-zlib-0.2.2.drv 
/gnu/store/gc7id7acy37m0m8rv5065k6v27bgplwb-guile-gcrypt-0.4.0.drv 
/gnu/store/i2xjiazsw6w6sasi6512mpg2vhkgcc64-guile-zstd-0.1.1.drv 
/gnu/store/iy671i667gzzk3qmjqbcik123jyvbw5k-module-import 
/gnu/store/k2vq741cnhcqwx0lcs883fa3d8dz03zm-bash-5.1.16.drv 
/gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile 
/gnu/store/q5vs629x4k6wqqr5r7s47lk0bxrbw9mz-guix-1.4.0-37.096dedd.drv 
/gnu/store/qjvgm41g12w22lrq90pc6w5hb2xglgcf-mkfontdir-1.0.7.drv 
/gnu/store/sv84m1a4ii2nhk6qfn8vkb06cgigrn5j-guile-ssh-0.18.0.drv 
/gnu/store/v6qfi0ni8vsnairxijbbsfgc1rhxgzf1-guile-sqlite3-0.1.3.drv 
/gnu/store/w743nnyv96h2sam8z31rx5vjrlnw3c4f-guile-3.0.9.drv 
/gnu/store/ylbxll2lv660b27jmd1jivq9b8k1wbj1-guile-semver-0.1.1.drv 

$ guix time-machine -q -- time-machine -C channels.scm -- build python-jax 
Mise à jour du canal « guix » depuis le dépôt Git « 
https://git.guix.gnu.org/guix.git »... 
Authentification du canal « guix », commits 9edb3f6 à 9b8bb29 (22 nouveaux 
commits)... 
substitute: recherche des substituts sur « https://guix.bordeaux.inria.fr »… 
100.0% 
substitute: recherche des substituts sur « https://ci.guix.gnu.org »… 100.0% 
substitute: recherche des substituts sur « https://bordeaux.guix.gnu.org »… 
100.0% 
substitute: recherche des substituts sur « https://guix.bordeaux.inria.fr »… 
100.0% 
substitute: recherche des substituts sur « https://guix.bordeaux.inria.fr »… 
100.0% 
module-import-compiled 1.3MiB 2.0MiB/s 00:01 ▕██████████████████▏ 100.0% 
module-import-compiled 1.5MiB 4.1MiB/s 00:00 ▕██████████████████▏ 100.0% 
construction de 
/gnu/store/m019by26af5fb765kqlcsxdwgn28nkyc-module-import.drv... 
construction de 
/gnu/store/znp03xsn1xx10bp7ahqb7fw27q351h6n-module-import.drv... 
construction de 
/gnu/store/3fkf9azm93md5j0k86pa3h8xp3in6kwz-compute-guix-derivation.drv... 
Computing Guix derivation for 'x86_64-linux'... / 
substitute: recherche des substituts sur « https://guix.bordeaux.inria.fr »… 
100.0% 
substitute: recherche des substituts sur « https://ci.guix.gnu.org »… 100.0% 
substitute: recherche des substituts sur « https://bordeaux.guix.gnu.org »… 
100.0% 
Les dérivations suivantes seront compilées : 
/gnu/store/bavg0g7pzzshn7v8k6zdhjsss3wzsd37-config.scm.drv 
/gnu/store/y878yr1n8dyy85cs14wj0z7b81pc0f1w-guix-config-source.drv 
/gnu/store/01mfw1sbhda3f7bh1zgqf4cncjxrin1n-guix-config.drv 
/gnu/store/6q47im78vd645vf02yzqzdg9vyk0wrgi-guix-config-modules.drv 
/gnu/store/848g26zzrp5s5wyj73nwiafbiv6ffzzp-guix-system-modules.drv 
/gnu/store/85g06b6qj8cnr0ndvl8cn8lpkmr18d5f-guix-home-modules.drv 
/gnu/store/9wa8m3a29lh8y32xf82wrjmjk51ss1bh-guix-packages-modules.drv 
/gnu/store/mxyxqhlcfdh8aq9kf467v138ymh9fhwf-config.scm.drv 
/gnu/store/smr2k7by6n5n052x1v4axf3jllk574vp-guix-core-source.drv 
/gnu/store/gmgpf4d7hjr7kphr9l4218vqcw9iqgvn-guix-core-modules.drv 
/gnu/store/i1mxnbhh6i5jphzsbyi20dbqz80yvbii-guix-cli-modules.drv 
/gnu/store/ki4yiha9yjx643s64ls08skh5mybc20c-guix-cli-core-modules.drv 
/gnu/store/w4z49jid58g16gdn0qimk90rfrvm4f2p-guix-system-tests-modules.drv 
/gnu/store/yl03cxlv2n0i4jfcx7dimhsxpf5cvsz7-guix-packages-base-modules.drv 
/gnu/store/c2206jydirhgpsgmj5rfm6m7ha6ddgwp-guix-9b8bb290e-modules.drv 
/gnu/store/ahswycg577l3ssmdc77iz071n63sfcra-guix-module-union.drv 
/gnu/store/5b9ml79hy13aj9vkj95afmivdmgm8axv-guix-command.drv 
/gnu/store/fvwdgqc5lxx3gzzaba2a0s6fgp84zl36-guix-misc.drv 
/gnu/store/xgiwbkaj5bj6f0qar9knfv9rvqhjih89-guix-daemon.drv 
/gnu/store/21sdnrznkw09na22022j9wm436xsjq8j-guix-9b8bb290e.drv 
/gnu/store/gsbfqikr031r93v3wyn4axmnn7azqfiw-profile.drv 
/gnu/store/9w9wc44475bkdpkwivfinwjqybizl96y-inferior-script.scm.drv 
/gnu/store/ibzygyx4jidwkmfgmaajp9018nrf1c8k-profile.drv 

14 éléments seront téléchargés 
guix-daemon.service 1KiB 397KiB/s 00:00 ▕██████████████████▏ 100.0% 
guix-cli 411KiB 2.2MiB/s 00:00 ▕██████████████████▏ 100.0% 
guix-cli-core 1022KiB 2.1MiB/s 00:00 ▕██████████████████▏ 100.0% 
guix-core 2.2MiB 3.1MiB/s 00:01 ▕██████████████████▏ 100.0% 
guix-daemon.cil 3KiB 1.3MiB/s 00:00 ▕██████████████████▏ 100.0% 
guix-gc.service 492B 261KiB/s 00:00 ▕██████████████████▏ 100.0% 
guix-home 1.4MiB 2.6MiB/s 00:01 ▕██████████████████▏ 100.0% 
guix-packages 2.2MiB 2.5MiB/s 00:01 ▕██████████████████▏ 100.0% 
guix-packages-base 22.4MiB 3.4MiB/s 00:07 ▕██████████████████▏ 100.0% 
guix-publish.service 562B 472KiB/s 00:00 ▕██████████████████▏ 100.0% 
guix-system 12.3MiB 3.2MiB/s 00:04 ▕██████████████████▏ 100.0% 
guix-system-tests 1.2MiB 2.3MiB/s 00:01 ▕██████████████████▏ 100.0% 
module-import-compiled 9KiB 1.9MiB/s 00:00 ▕██████████████████▏ 100.0% 
module-import-compiled 119KiB 2.3MiB/s 00:00 ▕██████████████████▏ 100.0% 
construction de /gnu/store/bavg0g7pzzshn7v8k6zdhjsss3wzsd37-config.scm.drv... 
construction de /gnu/store/mxyxqhlcfdh8aq9kf467v138ymh9fhwf-config.scm.drv... 
construction de 
/gnu/store/ki4yiha9yjx643s64ls08skh5mybc20c-guix-cli-core-modules.drv... 
construction de 
/gnu/store/i1mxnbhh6i5jphzsbyi20dbqz80yvbii-guix-cli-modules.drv... 
construction de 
/gnu/store/y878yr1n8dyy85cs14wj0z7b81pc0f1w-guix-config-source.drv... 
construction de 
/gnu/store/smr2k7by6n5n052x1v4axf3jllk574vp-guix-core-source.drv... 
construction de /gnu/store/01mfw1sbhda3f7bh1zgqf4cncjxrin1n-guix-config.drv... 
construction de 
/gnu/store/gmgpf4d7hjr7kphr9l4218vqcw9iqgvn-guix-core-modules.drv... 
construction de 
/gnu/store/6q47im78vd645vf02yzqzdg9vyk0wrgi-guix-config-modules.drv... 
construction de 
/gnu/store/85g06b6qj8cnr0ndvl8cn8lpkmr18d5f-guix-home-modules.drv... 
construction de /gnu/store/fvwdgqc5lxx3gzzaba2a0s6fgp84zl36-guix-misc.drv... 
construction de 
/gnu/store/yl03cxlv2n0i4jfcx7dimhsxpf5cvsz7-guix-packages-base-modules.drv... 
construction de 
/gnu/store/9wa8m3a29lh8y32xf82wrjmjk51ss1bh-guix-packages-modules.drv... 
construction de 
/gnu/store/848g26zzrp5s5wyj73nwiafbiv6ffzzp-guix-system-modules.drv... 
construction de 
/gnu/store/w4z49jid58g16gdn0qimk90rfrvm4f2p-guix-system-tests-modules.drv... 
construction de 
/gnu/store/c2206jydirhgpsgmj5rfm6m7ha6ddgwp-guix-9b8bb290e-modules.drv... 
construction de 
/gnu/store/ahswycg577l3ssmdc77iz071n63sfcra-guix-module-union.drv... 
construction de /gnu/store/5b9ml79hy13aj9vkj95afmivdmgm8axv-guix-command.drv... 
construction de /gnu/store/xgiwbkaj5bj6f0qar9knfv9rvqhjih89-guix-daemon.drv... 
construction de 
/gnu/store/21sdnrznkw09na22022j9wm436xsjq8j-guix-9b8bb290e.drv... 
construction de l'ensemble des certificats des AC… 
énumération des sous-répertoires Emacs… 
construction du répertoire des polices… 
construction du répertoire des manuels Info… 
construction du profil avec 1 paquet… 
construction de 
/gnu/store/9w9wc44475bkdpkwivfinwjqybizl96y-inferior-script.scm.drv... 
construction du cache des paquets… 
construction du profil avec 1 paquet… 
guix-science/build-system/bazel.scm:104:45: In procedure bazel-vendored-inputs: 
erreur : nss-certs : variable non liée 
conseil : Auriez-vous oublié `(use-modules (gnu packages certs))' ? 

$ guix time-machine -q --commit=52d82e555119c013cfbf9ad7671a56dc6c1a1f16 \ 
-- time-machine -C channels.scm -- build python-jax 
guix-science/build-system/bazel.scm:104:45: In procedure bazel-vendored-inputs: 
erreur : nss-certs : variable non liée 
conseil : Auriez-vous oublié `(use-modules (gnu packages certs))' ? 

--8<---------------cut here---------------end--------------->8--- 

And I don't think I have unpriviledged daemon, at least I did not change it 
knowingly and I still have 

$ ls -l /gnu/ 
total 11160 
drwxrwxr-t 9920 root guixbuild 11419648 26 août 07:35 store 

> I think something is twisted with your current Guix. And it’s hard to 
> find… especially remotely. :-) Sorry for the inconvenience. 

No problem, I am learning a lot of things on the way, thanks for the help. 
And at least my Guix is not too twisted because I can still use it without a 
problem on a day to day basis which is nice. 

And when I say I managed to reproduce on two machines, really they have 
different hardware but they both have exactly the same setup thanks to guix 
home and some version-controlled channel files and dotfiles. So them having the 
same bug is just guix being reproducible I suppose :). 

Best, 
Timothée 

> De: "Simon Tournier" <[email protected]>
> À: "Timothee Mathieu" <[email protected]>
> Cc: "help-guix" <[email protected]>, "Julien Teigny" <[email protected]>
> Envoyé: Mardi 26 Août 2025 00:12:09
> Objet: Re: guix time machine with channels that fail to compile

> Re,

> On Mon, 25 Aug 2025 at 23:11, Timothee Mathieu < [
> mailto:[email protected] | [email protected] ] > wrote:

> > $ guix time-machine -C channels.scm
> > /home/tmathieu/.cache/guix/inferiors/elqniarazslbnlsqgu5nzml2vwde7yks6hrdogagjslnewegsksq

> OK, good.

> > $ inferior=$(guix time-machine -C channels.scm)

> > $ guix gc --referrers $inferior
> > /gnu/store/0y5pd6dyzh2bf0xghp35pnhhpzp6fl39-fonts-dir.drv
> > /gnu/store/3gk1ws5cd7lzsszb5rj7j4nf0z6z1pm2-fonts-dir.drv
> > /gnu/store/7zmlq7qmywdl24s105br56hj569cfwwl-info-dir.drv
> > /gnu/store/9g6y370dkbqyyw0lyikzn2q8skrrkfl3-info-dir.drv
> > /gnu/store/hn1y38cm14s3symhqa6gwsx9ncc49x62-ca-certificate-bundle.drv
> > /gnu/store/knk5z194masymyhca9g9qwq8j2x50kbz-emacs-subdirs.drv
> > /gnu/store/pg632gs7n6nfdysajxkg4238g7341myl-ca-certificate-bundle.drv
> > /gnu/store/x61l4cvp38mp179cafnlb4hh1mz7y3ds-emacs-subdirs.drv
> > /gnu/store/9m9qslk48lv5pa36hk9n46xxnz3yw2jz-profile.drv
> > /gnu/store/pq8fd6pawkb5w96nk2wkdknh9m943ass-profile.drv
> > /gnu/store/r9imsxsryg3lsh52p8f7bjrzp5hx154i-profile
> > /gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile
> > /gnu/store/hj26a084miccwi8aqv9d5y69knhjf9bj-profile

> Hum, I miss why you get all that. It’s weird that you have three
> profiles here.

> Could you provide the output of

> guix gc --derivers $inferior

> ?

> > $ profile=$(guix gc --referrers $inferior)

> Because you all these derivations and 3 profiles above, here the
> variable $profile isn’t the profile that I expected…

> > $ guix gc --references $profile
>> guix gc: erreur : path
> > `/gnu/store/0y5pd6dyzh2bf0xghp35pnhhpzp6fl39-fonts-dir.drv
> > ' is not valid

> …however this is also unexpected. Somehow, I would expect something
> like:

> --8<---------------cut here---------------start------------->8---
> $ guix gc --references 
> /gnu/store/h73qvv7iljwk2fsz84q282jmr02jfg8y-fonts-dir.drv
> /gnu/store/8y97gfl4rzjmizfswx34hs36w66aa96g-mkfontdir-1.0.7.drv
> /gnu/store/9fypczkl6mnii90mgwaanil5g6226gbf-module-import
> /gnu/store/9nbpljaijxd5615sjnz8s2jspw8jw9a0-mkfontscale-1.2.3.drv
> /gnu/store/bz83qk3mjwifn7ib6wpkid0v9l9hdgrg-guile-3.0.9.drv
> /gnu/store/f6bcnz9p2i82y8cckk5k60j9622hhd69-fonts-dir-builder
> /gnu/store/in35p1g3s6fvbxk83j7s9y4yj6gbykca-guix-science.drv
> /gnu/store/mz26n1377c6s9vz860vps2hj21rcayfz-module-import-compiled.drv
> /gnu/store/zx2cd0cmgli0qjid6x8q2w081mzzn7jz-guix-52d82e555.drv
> --8<---------------cut here---------------end--------------->8---

> > So here I seem to get an error, some part of the profile is not
> > valid. Although, I checked, the file
> > /gnu/store/0y5pd6dyzh2bf0xghp35pnhhpzp6fl39-fonts-dir.drv does
> > exists. Anyway, I still did the other commands.

> > $ rm $inferior
> > $ guix gc -D $(guix gc --references $profile)
>> guix gc: erreur : path
> > `/gnu/store/0y5pd6dyzh2bf0xghp35pnhhpzp6fl39-fonts-dir.drv
> > ' is not valid

> Hum, this error is unexpected. Could you report the output of

> guix gc --list-live | grep 0y5pd6dyzh2bf0xghp35pnhhpzp6fl39-fonts-dir.drv

> and

> guix gc --list-dead | grep 0y5pd6dyzh2bf0xghp35pnhhpzp6fl39-fonts-dir.drv

> ? And if both outputs are empty,

> guix gc --list-live | grep fonts-dir\.drv | wc -l

> and

> guix gc --list-dead | grep fonts-dir\.drv | wc -l

> ?

> > $ guix time-machine -C channels.scm
> > <<<< I cut here a lot of substitute downloads >>>
> > /home/tmathieu/.cache/guix/inferiors/elqniarazslbnlsqgu5nzml2vwde7yks6hrdogagjslnewegsksq

> Good.

> > $ guix gc --references \
> > $(guix gc --referrers \
> > $(guix time-machine -C channels.scm))
> > /gnu/store/5zad9v0icvp9l9iadfyxwcycik43x8pm-guile-bytestructures-1.0.10.drv
> > /gnu/store/6a152xj4s049kpj8cznqpkpgsliywm1v-guile-git-0.10.0.drv
> > <<< I cut here, this list a bunch of drv files in the store >>>

> Well, I’m interested all the output. :-)

> For example, I get this:

> --8<---------------cut here---------------start------------->8---
> $ guix gc --references $(guix gc --referrers $(guix time-machine -C
> channels.scm))
> /gnu/store/30j7azqpy63m251nr887g748w18cki6r-guix-science
> /gnu/store/asljmlgl7c2lw710vvv7n490i5lnw0xk-info-dir
> /gnu/store/mzdzf2fqzafx25vwssgpwpjp6x9ga3br-emacs-subdirs
> /gnu/store/nw6nys0kg8118kxc9ks19n4zq2zpc0d0-profile
> /gnu/store/nxg5z5g7fh1c5vcrzv6d53xnaxxxnz2v-guix-52d82e555
> /gnu/store/wpdq87d6azndvb94cfigsfbh2ph7j9aj-guix-package-cache
> --8<---------------cut here---------------end--------------->8---

> And I was expecting something similar. Since you get many derivations,
> what is the running version of guix-daemon? Are you running an
> unprivileged daemon [1]?

> > $ guix time-machine -C channels.scm -- build python-jax -n --no-grafts
> > guix-science/build-system/bazel.scm:104:45: In procedure 
> > bazel-vendored-inputs:
> > erreur : nss-certs : variable non liée
> > conseil : Auriez-vous oublié `(use-modules (gnu packages certs))' ?

> > $ guix time-machine -C channels.scm -- build python-jax -d --no-grafts
> > guix-science/build-system/bazel.scm:104:45: In procedure 
> > bazel-vendored-inputs:
> > erreur : nss-certs : variable non liée
> > conseil : Auriez-vous oublié `(use-modules (gnu packages certs))' ?
> > --8<---------------cut here---------------end--------------->8---

> > So here it is. the cache cleaning does not seem to change things,
> > although there was a small error on the way I don't know if it is
> > important.

> I think something is twisted with your current Guix. And it’s hard to
> find… especially remotely. :-) Sorry for the inconvenience.

> What do you get if you run

> guix time-machine -q -- time-machine -C channels.scm -- build python-jax

> ? Or

> guix time-machine -q --commit=52d82e555119c013cfbf9ad7671a56dc6c1a1f16 \
> -- time-machine -C channels.scm -- build python-jax

> ?

> Cheers,
> simon

> 1: [ https://hpc.guix.info/blog/2025/03/build-daemon-drops-its-privileges |
> https://hpc.guix.info/blog/2025/03/build-daemon-drops-its-privileges ]

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