The following reply was made to PR pkg/53560; it has been noted by 
GNATS.
From: Thomas Klausner <wiz%NetBSD.org@localhost>
To: NetBSD bugtracking <gnats-bugs%NetBSD.org@localhost>
Cc:
Subject: Re: pkg/53560: devel/py-pluggy does not build for 
PYTHON_VERSION>27
Date: Wed, 29 Aug 2018 06:26:44 +0200
 On Tue, Aug 28, 2018 at 11:16:57PM +0200, Fr�d�ric Fauberteau wrote:
 > I totally agree with that. Actually, py-setuptools_scm should be 
fetched by
 > the setup.py script from the egg.mk framework and should not be 
added as a
 > dependency (even a build dependency) of py-pluggy.
 No. pkgsrc should provide all necessary dependencies to build a
 package. Fetching stuff from the internet during the build should not
 be necessary.
  Thomas