X11 issue with Root 5.34.36 + Ubuntu 22.04 docker container

Hi Rooters.

I am joining a team, where I plan to refresh a legacy code.
Bad news : it relies on Root 5.34.36 and has not been upgrade for Root 6 yet.
Running Root 5.34.36 ./configure on my Ubuntu 22.04 works fine.
But I highly prefer working with docker images, so I tried the official ubuntu:22.04 image, and…

Checking for libX11 ... no
configure: libX11 MUST be installed

Looking in the config.log file, I see that configure does not look in /usr/lib/x86_64-linux-gnu/, which is where the X11 libraries are standing. When running on my host machine, it looks there :sa:

Any idea ?

ROOT Version: 5.34.36
Platform: Ubuntu 22.04
Compiler: Not Provided

Well. I solved this first issue : the docker image lacks lsb-release. Can you believe it ?!?

What can I say: thanks for that!

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