> Such changes should be done in ‘core-updates’, not ‘master’, because
> they entail a full rebuild.

Oh, I'm sorry.  But could you explain why?  I'm puzzled because the
commit doesn't remove anything.

Could you provide a list of files that shouldn't be changed in 'master'?
I guess that 'gnu/packages/base.scm', 'gnu/packages/make-bootstrap.scm',
and 'guix/build' shouldn't be touched.  Anything else?