Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?

	sudo apt install virtualbox
		- Virtualbox package installed, but no .desktop and no virtualbox inside /usr/bin

	sudo apt install virtualbox-qt
		- Impossible de satisfaire les dépendances :
		 virtualbox-qt : Dépend: libqt6core6t64 (>= 6.10.2) mais 6.9.2+dfsg-4+b1 devra être installé
                 Dépend: libqt6help6 (>= 6.6.0) mais ne sera pas installé
                 Dépend: libqt6statemachine6 (>= 6.6.1) mais ne sera pas installé
                 Dépend: libqt6widgets6 (>= 6.10.2) mais 6.9.2+dfsg-4+b1 devra être installé

   * What outcome did you expect instead?

	The package doesn't install, virtualbox is not working/properly installed

Hi,

We are currently in a transition process for Qt 6, see #1127767 [1].

If you tell apt to prefer unstable instead of testing (e.g. -t sid),
then everything should install fine.

[1]: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1127767

Fast forward 3 months and virtualbox is not installable with python3 3.14, as
you can see below

# apt-get install virtualbox
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Solving dependencies... Error!
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 virtualbox : Depends: virtualbox-dkms (>= 7.2.8-dfsg-1) but it is not going to
be installed or
                       virtualbox-source (>= 7.2.8-dfsg-1) but it is not going
to be installed or
                       virtualbox-modules
              Depends: python3 (< 3.14) but 3.14.6-1 is to be installed
              Depends: python3-packaging but it is not going to be installed
              Depends: python3.13 but it is not going to be installed
              Depends: libgsoap-2.8.139 (>= 2.8.139) but it is not going to be
installed
              Depends: liblzf1 (>= 1.5) but it is not going to be installed
              Depends: libogg0 (>= 1.0rc3) but it is not going to be installed
              Depends: libsdl2-2.0-0 (>= 2.0.12) but it is not going to be
installed
              Depends: libtpms0 (>= 0.8.0~dev1) but it is not going to be
installed
              Depends: libvorbis0a (>= 1.2.3) but it is not going to be
installed
              Depends: libvorbisenc2 (>= 1.1.2) but it is not going to be
installed
              Depends: libvpx12 (>= 1.16.0) but it is not going to be installed
E: Unable to satisfy dependencies. Reached two conflicting assignments:
   1. virtualbox:amd64=7.2.8-dfsg-1 is selected for install
   2. virtualbox:amd64 Depends python3 (< 3.14)
      but none of the choices are installable:
      [no choices]

For the record, on ubuntu 26.04 (current lts) and 26.10 (current snapshot) that
do come with python 3.14 as the default, virtualbox (of the ubuntu repo) does
come with the correct dependency, the one on python 3.14, and no extra patches,
so I assume it is just a change in the control file and nothing more.

https://packages.ubuntu.com/resolute/virtualbox
https://packages.ubuntu.com/stonking/virtualbox