ABRoot removes groups added by packages added to host system

[artyom-smushkov]

I tried to add docker to VanillaOS Orchid installed in GNOME Boxes VM, I tried both building my custom image with docker

...
  - name: important-packages # Sample module using the built-in Apt module to install packages
    type: apt
    source:
      packages:
      - docker.io
...

and abroot pkg add docker.io/abroot pkg apply , package is installed but docker group is not in /etc/group and docker socket cannot be started because of it. I also tried it with sddm package and sddm group is also not there. When installing them inside of vso-os-shell with sudo apt install docker.io sddm both groups are there along with groups added by sddm dependencies, so I guess ABRoot removes them when it is doing its special merge of group file.