Create a vmpool on an existing lvm logical volume

I have the very bad habit to create a volume group over which build the pool of
my main disk. Then I suddenly need a lvm pool for my virtual machines with libvirt.
I use this trick: I create a logical volume in the volume group, I place
another volume group inside the aforementioned logic volume and then I create
over it the lvm pool. In commands

% lsblk
sdb                         8:16   0   5.5T  0 disk  
└─sdb1                      8:17   0   5.5T  0 part  
  └─lvm                   254:1    0   5.5T  0 crypt 
    ├─vg-vms              254:2    0   600G  0 lvm   
    ├─vg-data             254:3    0   1.7T  0 lvm   
    ├─vg-Winzozz          254:4    0    30G  0 lvm   
    └─vg-shared           254:5    0     8G  0 lvm

% sudo lvcreate -l 100%FREE vg -n vmpool-me

% sudo vgcreate vmpool /dev/mapper/vg-vmpool--me

% lsblk
sdb                         8:16   0   5.5T  0 disk  
└─sdb1                      8:17   0   5.5T  0 part  
  └─lvm                   254:1    0   5.5T  0 crypt 
    ├─vg-vms              254:2    0   600G  0 lvm   
    ├─vg-data             254:3    0   1.7T  0 lvm   
    ├─vg-Winzozz          254:4    0    30G  0 lvm   
    ├─vg-shared           254:5    0     8G  0 lvm   
    └─vg-vmpool--me       254:6    0   3.1T  0 lvm

% sudo virsh

virsh # pool-define-as vmpool logical - - /dev/Terone/vmpool-me vmpool /dev/vmpool
Pool vmpool defined

virsh # pool-build vmpool
Pool vmpool built

virsh # pool-start vmpool
Pool vmpool started

Obviously, everything is inside a luks encrypted partition 😉