apt.llvm.org ubuntu-24.04 packages: cannot install both libc++-20-dev and libgstreamer1.0-dev

[jcelerier]

libc++-20-dev depends on libunwind-20-dev which conflicts with libunwind-dev that libgstreamer1.0-dev requires.
How can this conflict be fixed?

[firewave]

This might be related to #144501.