linux-headers-5.4.0-0.bpo.4-amd64 not found

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See also: https://github.com/AdnanHodzic/displaylink-debian/issues/163

--------------------------- displaylink-debian -------------------------------

DisplayLink driver installer for Debian and Ubuntu based Linux distributions:

* Debian, Ubuntu, Elementary OS, Mint, Kali, Deepin and many more!
* Full list of all supported platforms: http://bit.ly/2zrwz2u
* When submitting a new issue, include Debug information

Options:

[I]nstall                                                                                                                                                                                                                                     
[D]ebug
[R]e-install
[U]ninstall
[Q]uit

Select a key: [i/d/r/u/q]: I

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Checking dependencies

unzip is installed
dpkg-query: Paket »linux-headers-5.4.0-0.bpo.4-amd64« ist nicht installiert und es ist keine Information verfügbar
Verwenden Sie dpkg --info (= dpkg-deb --info) zum Untersuchen von Archiven.
linux-headers-5.4.0-0.bpo.4-amd64 not found! Install? [Y/n] y
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut.
Statusinformationen werden eingelesen.... Fertig
E: Paket linux-headers-5.4.0-0.bpo.4-amd64 kann nicht gefunden werden.
E: Mittels des Musters »linux-headers-5.4.0-0.bpo.4-amd64« konnte kein Paket gefunden werden.
E: Mittels regulärem Ausdruck »linux-headers-5.4.0-0.bpo.4-amd64« konnte kein Paket gefunden werden.
linux-headers-5.4.0-0.bpo.4-amd64 installation failed.  Aborting.

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Starting Debug ...

Did you read Post Installation Guide? http://bit.ly/2TbZleK [y/N] y

Did you read Troubleshooting most common issues? http://bit.ly/2Rofd0x [y/N] y

--------------- Linux system info ----------------

Distro: Debian
Release: buster
Kernel: 5.4.0-0.bpo.4-amd64

---------------- DisplayLink info ----------------

Driver version:
DisplayLink service status:
EVDI service version: /sys/devices/evdi/version not found

------------------ Graphics card -----------------

Vendor: i915
Subsystem: 620
VGA: Intel Corporation UHD Graphics 620 (Whiskey Lake) (rev 02)
VGA (3D):
X11 version: 1.20.4-1+deb10u3

-------------- DisplayLink xorg.conf -------------

File: /etc/X11/xorg.conf.d/20-displaylink.conf
cat: /etc/X11/xorg.conf.d/20-displaylink.conf: Datei oder Verzeichnis nicht gefunden
Contents:

-------------------- Monitors --------------------

Providers: number : 1
Provider 0: id: 0x47 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 3 outputs: 5 associated providers: 0 name:modesetting                                                                                          

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Use this information when submitting an issue (http://bit.ly/2GLDlpY)

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Issue #141

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# lsb_release -a && uname -r
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 10 (buster)
Release:        10
Codename:       buster
5.4.0-0.bpo.4-amd64

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Same with

# uname -r
5.10.0-0.bpo.7-amd64

# LANG=C ./displaylink-debian.sh --install

-------------------------------------------------------------------

Checking dependencies

unzip is installed
dpkg-query: package 'linux-headers-5.10.0-0.bpo.7-amd64' is not installed and no information is available
Use dpkg --info (= dpkg-deb --info) to examine archive files.
linux-headers-5.10.0-0.bpo.7-amd64 not found! Install? [Y/n] 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package linux-headers-5.10.0-0.bpo.7-amd64
E: Couldn't find any package by glob 'linux-headers-5.10.0-0.bpo.7-amd64'
E: Couldn't find any package by regex 'linux-headers-5.10.0-0.bpo.7-amd64'
linux-headers-5.10.0-0.bpo.7-amd64 installation failed.  Aborting.