virt-manager and qemu: virtual networking missing

[Charles Curley <charlescurley@charlescurley.com>]

I did a fresh installation of Debian 13 (trixie), and then tried to
install what I need for virtual machines:

apt install bridge-utils virt-manager dnsmasq-base

I then try to start the default virtual network, and get an error
message that the network is already in use by interface wlp1s0. Running
"ip a" shows only the hardware interfaces and lo. The default network
is looking for virbr0, which does not exist.

I should also have two new zones for libvirt in firewalld; they are
absent.

What am I missing?

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