Add prototype DBIx::Class::Migration (WIP)

I want to run this:
  dbic-migration -Ilib install --schema_class Mojochrome::Schema

But this gives me:
  Since this database is not versioned, we will assume version 1
  Reading configurations from /home/bjorn/src/Mojochrome/share/fixtures/1/conf
  Could not find a proper name for relationship 'collections_2s' in source
  'Photo' for columns 'id'. Supply a value in
  'inflect_plural' for 'collections_2' or 'rel_name_map' for
  'collections_2s' to name this relationship.
  Can't call method "schema" on an undefined value at /home/bjorn/src/Mojochrome/share/migrations/_common/deploy/1/002-demo.pl line 12.

But I don't understand how to use inflect_plural or rel_name_map.