pyp2rpm generates a fedora spec for itself that includes "packaging < 21" as one of its buildrequirements, but that should only be true when python_version < 3.5.
$ pyp2rpm pyp2rpm
# Created by pyp2rpm-3.3.7
...
BuildRequires: python3dist(packaging) < 21
pyp2rpm generates a fedora spec for itself that includes "packaging < 21" as one of its buildrequirements, but that should only be true when python_version < 3.5.