aptitude problem with control file (in stretch)

[Harald Dunkel <harald.dunkel@aixigo.com>]

Hi folks,

I've got a problem with upgrading a private package in Stretch. The control
file says:

	Package: sample-lxc
	Architecture: all
	Depends: ${misc:Depends}
		, cgmanager | systemd
		, debootstrap
		, lxc
		, lxc-templates | lxc ( << 3 )
	Recommends: cgroup-tools
		, apparmor
		, uidmap
		, yum
	Conflicts: lxcfs
	Description: LXC framework
	 This package provides LXC for our environment.

lxc-templates is available only for lxc >= 3 (Buster or Bullseye), and
then its a must-have in my environment.

Trying to install this package on Stretch aptitude complains about a
missing lxc-templates package, even though the most recent lxc version
1:2.0.11-1~xgo90+1 is installed.

apt and apt-get are fine, AFAICS.

???


Regards
Harri