Potentially. The PEP doesn’t make it clear who is going to be using it or when.
Does it need to be available for all installs? Only when people are compiling extensions?
I raised this with the steering committee in PEP 739 demands installation of the build-details.json name under the same name in the same location for different builds · Issue #341 · python/steering-council · GitHub. Currently I don’t know how to properly solve that with the layout used in Debian and Ubuntu.
It’s my understanding that this file isn’t yet used widely, but this will become a problem when this file needs to be installed for the standard build and the debug build at the same time for e.g. some package builds.