Considering this conversation : https://framapiaf.org/web/statuses/103580390068629106
You could try these commands with your user AND with the root user : $ guix pull && guix upgrade && guix install glibc-locales $ sudo -i # guix pull && guix upgrade && guix install glibc-locales # exit # reboot Also, there is also a package for utf-8 locales : glibc-utf8-locales. Hope it can help ! Jérémy