I will share just how I myself did from the new installed pure Etiona 9
64bit.
sudo apt-get install qemu-kvm libvirt-daemon-system libvirt-clients
gir1.2-spiceclientgtk-3.0
and then, since I prefer newest version of virt-manager, and since it is very
easy to build it from source, I just follow instructions in their github:
https://github.com/virt-manager/virt-manager/blob/master/INSTALL.md
git clone https://github.com/virt-manager/virt-manager.git
cd virt-manager
./virt-manager
or
./setup.py install
Then you will have to reboot to make it work without "permission denied"
problems.