varnish: Depends: libc6-dev but it is not installable

[nigoroll]

From @mboy1011 originally opened as varnishcache/varnish-cache#3970

Expected Behavior

I want to install varnish/jammy 7.3.0-1~jammy amd64 on my Ubuntu 22.04.2 LTS Server Unfortunately I couldn't install it due to:
The following packages have unmet dependencies:
varnish : Depends: libc6-dev but it is not installable or
libc6.1-dev but it is not installable or
libc-dev
E: Unable to correct problems, you have held broken packages.

I've already followed the step-by-step installation here via the official manual instruction from Varnishcache.

Current Behavior

The following packages have unmet dependencies:
varnish : Depends: libc6-dev but it is not installable or
libc6.1-dev but it is not installable or
libc-dev
E: Unable to correct problems, you have held broken packages

Possible Solution

No response

Steps to Reproduce (for bugs)

1. sudo apt-get update
2. sudo apt-get install debian-archive-keyring
3. sudo apt-get install curl gnupg apt-transport-https
4. mkdir -p /etc/apt/keyrings/
5. curl -fsSL https://packagecloud.io/varnishcache/varnish73/gpgkey | gpg --dearmor > /etc/apt/keyrings/varnishcache_varnish73-archive-keyring.gpg
6. Create a file named: /etc/apt/sources.list.d/varnishcache_varnish73.list
7. echo "deb [signed-by=/etc/apt/keyrings/varnishcache_varnish73-archive-keyring.gpg] https://packagecloud.io/varnishcache/varnish73/ubuntu jammy main \ndeb-src [signed-by=/etc/apt/keyrings/varnishcache_varnish73-archive-keyring.gpg] https://packagecloud.io/varnishcache/varnish73/ubuntu jammy main"
8. sudo apt-get update
9. apt install varnish -y

Context

To configure my Magento 2.4.6-p2 Instance to have a successful Full Page Cache using Varnish, which is advised for production servers, I just want to install it using the most recent version of libc6-dev where there's a recent security patch and depends on it.

Varnish Cache version

No response

Operating system

Ubuntu 22.04.2 LTS

Source of binary packages used (if any)

No response

[gquintard]

Can't reproduce, this works (automated):

FROM ubuntu:22.04

RUN set -ex; \
    apt-get update; \
    apt-get install -yqq curl; \
    curl -s https://packagecloud.io/install/repositories/varnishcache/varnish73/script.deb.sh | bash; \
    apt-get install -yqq varnish; \
    varnishd -V | grep 'varnish-7.3.0'

as does this (manual):

FROM ubuntu:22.04

COPY varnishcache_varnish73.list /etc/apt/sources.list.d/varnishcache_varnish73.list

RUN set -ex; \
    apt-get update; \
    apt-get install -yqq curl gnupg apt-transport-https; \
    mkdir -p /etc/apt/keyrings/; \
    curl -fsSL https://packagecloud.io/varnishcache/varnish73/gpgkey | gpg --dearmor > /etc/apt/keyrings/varnishcache_varnish73-archive-keyring.gpg; \
    apt-get update; \
    apt-get install -yqq varnish; \
    varnishd -V | grep 'varnish-7.3.0'