Run of unchanged for swiglpk

Try this locally (using silver-platter):

debian-svp just-build --revision=git-v1:3770f2aff4799917635be28db85ea09a5f1c6be9 swiglpk 
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  File "/srv/janitor/debian-janitor/breezy/breezy/ui/text.py", line 36, in <module>
    from .. import (
  File "/srv/janitor/debian-janitor/breezy/breezy/config.py", line 80, in <module>
    import configobj
  File "/usr/lib/python3/dist-packages/configobj.py", line 23, in <module>
    from _version import __version__
ImportError: cannot import name '__version__' from '_version' (/tmp/janitor2idf8t88/swiglpk/_version.py)

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