[Python-modules-team] Bug#796902: python-scipy: FTBFS: dh: unable to load addon sphinxdoc

[Aaron M. Ucko]

Source: python-scipy
Version: 0.16.0-1
Severity: serious
Justification: fails to build from source (but built successfully in the past)

Builds of python-scipy in minimal environments geared for building
only its architecture-dependent binary packages have been failing with
errors along the lines of

  dpkg-buildpackage: host architecture arm64
   fakeroot debian/rules clean
  dh clean --with python2,python3,sphinxdoc
  dh: unable to load addon sphinxdoc: Can't locate Debian/Debhelper/Sequence/sphinxdoc.pm in @INC (you may need to install the Debian::Debhelper::Sequence::sphinxdoc module) (@INC contains: /etc/perl /usr/local/lib/aarch64-linux-gnu/perl/5.20.2 /usr/local/share/perl/5.20.2 /usr/lib/aarch64-linux-gnu/perl5/5.20 /usr/share/perl5 /usr/lib/aarch64-linux-gnu/perl/5.20 /usr/share/perl/5.20 /usr/local/lib/site_perl .) at (eval 5) line 2.
  BEGIN failed--compilation aborted at (eval 5) line 2.
  
  make: *** [clean] Error 2
  debian/rules:16: recipe for target 'clean' failed

Please either conditionalize the use of --with sphinxdoc appropriately
or move python-sphinx from Build-Depends-Indep to Build-Depends.

Thanks!