bug#22907: `guix package -u` fails

[Ricardo Wurmus]

Nils Gillmann <niaster...@grrlz.net> writes:

> niasterisk@khazad-dum ~$ time guix package --substitute-urls=hydra.gnu.org 
> --dry-run -u *.*

“-u” takes a regular expression like '.*'

It seems to work for me.

~~ Ricardo