Suggestion to revert meson upgrade to 0.60.x
Meson was upgraded to 0.60.1 with a6d8ba86, but we're currently in a release freeze. It's not a good idea to upgrade these kinds of tools just before a new release is being made and after all the packages have already been built.
One issue we already run into is https://mesonbuild.com/Release-notes-for-0-60-0.html#unknown-options-are-now-always-fatal, which means any package that defines something with -D
that is not known, will now fail to build, so unless we audit all packages, we can have packages in 3.15 which fail to build.