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How can I install a specific version of Mesa?

ar flag

I need to install mesa 20.x for Unity3D. Using ubuntu 20.04.

I tried the two ppas (ppa:kisak/kisak-mesa and oxxx) but there version is more recent than ubuntu. How can I do this?

see bug report https://issuetracker.unity3d.com/issues/linux-editor-crashes-at-assert-fail-base-dot-cold-when-opening-a-project

I tried sudo apt-get install -f libgl1-mesa-dev=20.0.4-2ubuntu1 but I get the following message:

The following packages have unmet dependencies:
 libgl1-mesa-dev : Depends: libgl-dev but it is not going to be installed
                   Depends: libglvnd-dev but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

But libglvnd-dev is already installed

libglvnd-dev is already the newest version (1.3.2-1~ubuntu0.20.04.1).
Someone avatar
my flag
Which version of Ubuntu are you using?
Alexus avatar
ar flag
I'm using 20.04 at the moment.
mangohost

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