I found the cause: .local/lib/python3.10/site-packages/ is part of the interpreter's load path, and so an old version of numpy was imported in priority over guix's.
I don't know if this is by design, but if so, it means that any pip --user installed package will overshadow any guix install package, even when giving --pure to guix shell. It may not be what we want. What made me find this is that sklearn worked when in a container, but not in a shell, that meant that something from the local system was leaking into the shell. help-debb...@gnu.org (GNU bug Tracking System) writes: > Thank you for filing a new bug report with debbugs.gnu.org. > > This is an automatically generated reply to let you know your message > has been received. > > Your message is being forwarded to the package maintainers and other > interested parties for their attention; they will reply in due course. > > Your message has been sent to the package maintainer(s): > bug-guix@gnu.org > > If you wish to submit further information on this problem, please > send it to 63...@debbugs.gnu.org. > > Please do not send mail to help-debb...@gnu.org unless you wish > to report a problem with the Bug-tracking system.
