How can this Btrfs subvolume layout for Fedora be adapted for NixOS?

root → / home → /home opt → /opt cache → /var/cache gdm → /var/lib/gdm libvirt → /var/lib/libvirt log → /var/log spool → /var/spool tmp → /var/tmp snapshots → /snapshots

I want to have similar kind of results for my next install of NixOS.