Unexpected Depends: both python-central and python-support

[Ben Finney <ben@benfinney.id.au>]

Howdy all,

I recently packaged 'python-minimock', using debhelper 7 and
python-central.

    <URL:http://ftp.de.debian.org/debian/pool/main/p/python-minimock/python-minimock_0.8-2.dsc>

The Depends from the control file are:

    Build-Depends: debhelper (>= 7.0.8),
        python-central (>= 0.6.7),
        python-all-dev (>= 2.3.5-11)

    …
    Depends: ${misc:Depends}, ${python:Depends}

The resulting binary package, though, has pulled in a dependency on
python-support:

    Depends: python, python-central (>= 0.6.7), python-support (>= 0.7.1)

What's causing this, and how can I fix it so it doesn't have this
unexpected extra dependency?

-- 
 \     "Ours is a world where people don't know what they want and are |
  `\    willing to go through hell to get it."  -- Donald Robert Perry |
_o__)                                                          Marquis |
Ben Finney