I thought this would be an easy upgrade, but it seems that it will
cause a lot of churn. 'guix refresh' says:

    Building the following 1640 packages would ensure 3146 dependent
packages are rebuilt

I believe this is because Shepherd is built against guile-3.0-latest,
and elogind depends on Shepherd.

Guix *should* be in a position to get fresh Guile builds quickly, but
I guess this process will be slow until the guile-3.0 package can be
upgraded to 3.0.10 (which will require a world rebuild) at which point
Shepherd can return to using guile-3.0.

There's a lot of compiler improvements and bug fixes in 3.0.10, so it
would be nice to have this update land soon. After this, I can update
guile-hoot depend on it rather than guile-next. Several other packages
depending on guile-next could also be upgraded to use guile-3.0-latest
instead, such as guile-ares-rs.

Who can help me "shepherd" this upgrade? ;)

Thanks,

- Dave