How to fix missing webkit2gtk-4.0 when launching flutter linux application on Ubuntu

While trying to build a linux application on an old laptop upgrade to ubuntu 24.04, I encountered the following issue:

Building Linux application...
CMake Error at /usr/share/cmake-3.28/Modules/FindPkgConfig.cmake:619 (message):

The following required packages were not found:
   - webkit2gtk-4.0

Trying

sudo apt install libwebkit2gtk-4.0-dev

was not working (package not found)

The only solution I found was here:

https://www.reddit.com/r/Ubuntu/comments/1dd1qxz/libwebkit2gtk4037_is_not_available_on_ubuntu_2404/

Adding 

Types: deb
URIs: http://gb.archive.ubuntu.com/ubuntu
Suites: jammy
Components: main

to

/etc/apt/sources.list.d/ubuntu.sources

then running 

sudo apt update
sudo apt install libwebkit2gtk-4.0-dev
sudo apt --fix-broken install

fixes the issue


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