[ ] The only missing backport is spack/spack#30030
[x] Remove backported PythonPackage class
[ ] Pull changes from add-cmssw branch
[ ] Check concretization
[ ] Maybe we need to override Boost.with_default_variants: otherwise we need to enable several variants that are explicitly disabled in cmsdist. Ref this change.
Checklist:
Boost.with_default_variants: otherwise we need to enable several variants that are explicitly disabled in cmsdist. Ref this change.The build should wait until buildcache is ready