> I still think it's probably a good idea to switch away from JFS, since
> you're likely to run into other problems like this,

I see this as an opportunity to report problems.

> but if you really
> want to stick with JFS, compiling a newer version of SQLite and then
> reconfiguring and rebuilding Guix might get you past this immediate
> problem.

I think I’ll try the new version of SQLite.  That should be faster.