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# apt install virtualbox
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
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: libc6 (>= 2.33) but 2.31-13+deb11u2 is to be installed
Depends: libstdc++6 (>= 11) but 10.2.1-6 is to be installed
Recommends: virtualbox-qt (= 6.1.30-dfsg-2) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
$ cat /etc/apt/sources.list | grep -v -e "#"
deb http://deb.debian.org/debian/ bullseye main contrib non-free
deb-src http://deb.debian.org/debian/ bullseye main contrib non-free
deb http://security.debian.org/debian-security bullseye-security main contrib non-free
deb-src http://security.debian.org/debian-security bullseye-security main contrib non-free
deb http://deb.debian.org/debian/ bullseye-updates main contrib non-free
deb-src http://deb.debian.org/debian/ bullseye-updates main contrib non-free
$ cat /etc/apt/sources.list.d/buster-backports.list
deb http://deb.debian.org/debian bullseye-backports main contrib
deb-src http://deb.debian.org/debian bullseye-backports main contrib
$ cat /etc/apt/sources.list.d/buster.list
deb https://deb.debian.org/debian/ buster main contrib non-free
deb-src https://deb.debian.org/debian/ buster main contrib non-free
$ cat /etc/apt/sources.list.d/unstable.list
deb https://deb.debian.org/debian/ unstable main contrib non-free
deb-src https://deb.debian.org/debian/ unstable main contrib non-free
$ cat /etc/apt/preferences.d/90_zfs
Package: libnvpair1linux libuutil1linux libzfs2linux libzfslinux-dev libzpool2linux python3-pyzfs pyzfs-doc spl spl-dkms zfs-dkms zfs-dracut zfs-initramfs zfs-test zfsutils-linux zfsutils-linux-dev zfs-zed
Pin: release n=bullseye-backports___
Pin-Priority: 990
# cat /etc/apt/sources.list.d/buster.list
#deb https://deb.debian.org/debian/ buster main contrib non-free
#deb-src https://deb.debian.org/debian/ buster main contrib non-free
# apt update
[...]
# apt install virtualbox
[...]
The following packages have unmet dependencies:
virtualbox : Depends: libc6 (>= 2.33) but 2.31-13+deb11u2 is to be installed
Depends: libstdc++6 (>= 11) but 10.2.1-6 is to be installed
Recommends: virtualbox-qt (= 6.1.30-dfsg-2) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
$ cat /etc/apt/sources.list.d/unstable.list
#deb https://deb.debian.org/debian/ unstable main contrib non-free
#deb-src https://deb.debian.org/debian/ unstable main contrib non-free
$ cat /etc/apt/sources.list.d/virtualbox.list
# https://forums.debian.net/viewtopic.php?f=6&t=151296&p=749332#p749332
# https://wiki.debian.org/VirtualBox#Debian_10_.22Buster.22_and_Debian_11_.22Bullseye.22
# https://fasttrack.debian.net/
deb https://fasttrack.debian.net/debian-fasttrack/ bullseye-fasttrack main contrib
deb https://fasttrack.debian.net/debian-fasttrack/ bullseye-backports-staging main contrib
$ apt install fasttrack-archive-keyring
[...]
$ apt update
[...]
# apt install virtualbox
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed:
libgsoap-2.8.104 liblzf1 libvncserver1 virtualbox-dkms virtualbox-qt
Suggested packages:
vde2 virtualbox-guest-additions-iso
The following NEW packages will be installed:
libgsoap-2.8.104 liblzf1 libvncserver1 virtualbox virtualbox-dkms virtualbox-qt
0 upgraded, 6 newly installed, 0 to remove and 23 not upgraded.
Need to get 44.2 MB of archives.
After this operation, 176 MB of additional disk space will be used.
Do you want to continue? [Y/n]