Bug#856926: rekall: package not installable after no-change rebuild

[Graham Inggs]

Source: rekall
Version: 1.6.0+dfsg-1
Severity: serious

Hi Maintainer

Rebuilding rekall in sid or testing results in package 
python-rekall-core not being installable due to a strict versioned 
dependency on python-crypto (= 2.6.1).

See contents of python-rekall-core.substvars:

python:Provides=python2.7-rekall-core
python:Versions=2.7
python:Depends=python-acora, python-aff4, python-arrow, 
python-artifacts, python-capstone, python-crypto (= 2.6.1), 
python-dateutil, python-efilter, python-intervaltree, python-ipaddr, 
python-psutil, python-pyelftools, python-pyparsing, 
python-sortedcontainers, python-tsk, python-tz, python-yaml, 
python-yara, python:any (<< 2.8), python:any (>= 2.7.5-5~), python:any 
(>= 2.7~)
misc:Depends=
misc:Pre-Depends=

This only occurs when rebuilding with dh-python 2.20170125.
Rebuilding with dh-python 2.20160818 results in an unversioned 
dependency on python-crypto.

Regards
Graham