https://packages.guix.gnu.org/search/?query=pipewire shows me pipewire-1.2.5 and wireplumber-0.5.6.
https://toys.whereis.xn--q9jyb4c/?search=pipewire shows me pipewire-1.0.3.
https://toys.whereis.xn--q9jyb4c/?search=wireplumber shows me wireplumber-0.5.3
Thank you for the report, should be fixed!