Packer Cannot Find "default" Pool

I create a pool called "default" using `virsh`. When I run `packer build .` I get

```
==> libvirt.x86_64: Error while looking up storage pool default: Storage pool not found: no storage pool with matching name 'default'
```

But the pool does exist
```
$ virsh pool-list
 Name      State    Autostart
-------------------------------
 default   active   no
```

What am I doing wrong?