ckanext-spatial and ckan 1.8(?)

gistfile1.txt

paster --plugin=ckanext-spatial spatial initdb 4326 --config /etc/ckan/std/std.ini 

Traceback (most recent call last):
  File "/usr/local/ckan/bin/paster", line 9, in <module>
    load_entry_point('PasteScript==1.7.3', 'console_scripts', 'paster')()
  File "/usr/local/ckan/local/lib/python2.7/site-packages/paste/script/command.py", line 84, in run
    invoke(command, command_name, options, args[1:])
  File "/usr/local/ckan/local/lib/python2.7/site-packages/paste/script/command.py", line 123, in invoke
    exit_code = runner.run(args)
  File "/usr/local/ckan/local/lib/python2.7/site-packages/paste/script/command.py", line 218, in run
    result = self.command()
  File "/usr/local/ckan/src/ckanext-spatial/ckanext/spatial/commands/spatial.py", line 46, in command
    self.initdb()    
  File "/usr/local/ckan/src/ckanext-spatial/ckanext/spatial/commands/spatial.py", line 60, in initdb
    db_setup(srid)
  File "/usr/local/ckan/src/ckanext-spatial/ckanext/spatial/model.py", line 20, in setup
    define_spatial_tables(srid)
  File "/usr/local/ckan/src/ckanext-spatial/ckanext/spatial/model.py", line 66, in define_spatial_tables
    package_extent_table = Table('package_extent', metadata,
NameError: global name 'metadata' is not defined