Hello, I think I may have experienced this issue; the symptoms:
--8<---------------cut here---------------start------------->8--- $ guix pull [...] \builder for `/gnu/store/zliavnqgx3jxp8yc44nn1y34b3bjvlcw-guix-package-cache.drv' failed to produce output path `/gnu/store/0m2c2zrphqpmfhjb60k85yhfq704ay5r-guix-package-cache' la compilation de /gnu/store/zliavnqgx3jxp8yc44nn1y34b3bjvlcw-guix-package-cache.drv a échoué conseil : This usually indicates a bug in one of the channels you are pulling from, or some incompatibility among them. You can check the build log and report the issue to the channel developers. The channels you are pulling from are: guix sfl-packages. Vous trouverez le journal de compilation dans « /var/log/guix/drvs/zl/iavnqgx3jxp8yc44nn1y34b3bjvlcw-guix-package-cache.drv ». cannot build derivation `/gnu/store/v5rszp4m1vv7zf20vrb1sghi4528d40j-profile.drv': 1 dependencies couldn't be built guix pull: erreur : build of `/gnu/store/v5rszp4m1vv7zf20vrb1sghi4528d40j-profile.drv' failed $ tail /var/log/guix/drvs/zl/iavnqgx3jxp8yc44nn1y34b3bjvlcw-guix-package-cache.drv 1694:48 4 (thunk) In sfl/packages/sflvault.scm: 75:29 3 (propagated-inputs #<package python-sflvault-common@0.9?>) In ice-9/boot-9.scm: 1685:16 2 (raise-exception _ #:continuable? _) 1780:13 1 (_ #<&compound-exception components: (#<&undefined-vari?>) In unknown file: 0 (backtrace #<undefined>) (exception unbound-variable (value #f) (value "Unbound variable: ~S") (value (python-pycrypto)) (value #f)) $ guix time-machine --commit=9ed65e6af77893b658a7159b091b5002892c2f95 -- show python-pycrypto name: python-pycrypto version: 2.6.1 [...] --8<---------------cut here---------------end--------------->8--- The problematic channel is pinned via an inferior at the above commit, so I'm surprised the error mentions python-pyrypto is unbound (it exists at least, according to the above time-machine invocation). I'll keep a backup of ~/.cache/guix/checkouts/ around for forensics. -- Thanks, Maxim