Bug#802415: zope.schema: FTBFS: Missing build-dep on zope.interface(?)

[Chris West (Faux)]

Source: zope.schema
Version: 4.4.2-2
Severity: serious
Justification: fails to build from source
Tags: sid stretch
User: reproducible-builds at lists.alioth.debian.org
Usertags: ftbfs
X-Debbugs-CC: reproducible-builds at lists.alioth.debian.org

Dear Maintainer,

The package fails to build without networking.  It's against Policy to
download stuff from PyPy during the build, so this needs to be in a
build-dep:

test_w_non_fields (zope.schema.tests.test_interfaces.Test__fields) ... ok

----------------------------------------------------------------------
Ran 412 tests in 0.084s

OK
I: pybuild base:170: python3.5 setup.py test 
running test
Searching for zope.interface>=3.6.0
Reading https://pypi.python.org/simple/zope.interface/
Download error on https://pypi.python.org/simple/zope.interface/: [Errno 111] Connection refused -- Some packages may not be found!
Couldn't find index page for 'zope.interface' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading https://pypi.python.org/simple/
Download error on https://pypi.python.org/simple/: [Errno 111] Connection refused -- Some packages may not be found!
No local packages or download links found for zope.interface>=3.6.0
error: Could not find suitable distribution for Requirement.parse('zope.interface>=3.6.0')
E: pybuild pybuild:262: test: plugin distutils failed with: exit code=1: python3.5 setup.py test 

Full build log:
https://reproducible.debian.net/rb-pkg/unstable/amd64/zope.schema.html

-- System Information:
Debian Release: stretch/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)