$ sudo apt install system-image-dbus
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  dirmngr gnupg-agent gnupg1 gnupg1-curl gnupg1-l10n gnupg2 libassuan0 libksba8 libnpth0 pinentry-curses python3-gnupg python3-xdg system-image-common
Suggested packages:
  gnupg-doc libpcsclite1 parcimonie xloadimage | imagemagick | eog xloadimage pinentry-doc
The following packages will be REMOVED:
  gnupg snapd
The following NEW packages will be installed:
  dirmngr gnupg-agent gnupg1 gnupg1-curl gnupg1-l10n gnupg2 libassuan0 libksba8 libnpth0 pinentry-curses python3-gnupg python3-xdg system-image-common system-image-dbus
0 upgraded, 14 newly installed, 2 to remove and 16 not upgraded.