I'm trying to migrate a D7 site to D8 following this tut: http://www.metaltoad.com/blog/migrating-taxonomy-drupal-7-to-drupal-8
When I run
drush migrate-manifest manifest.yml --legacy-db-url=mysql://{dbuser}:{dbpass}@localhost/{dbname}
I get the error:
The drush command 'migrate-manifest' could not be found.
I'm using drush version 8.0-dev. Installed via composer. I also tried version 7.* and got the same message plus "Drush 7.0.0 does not support Drupal 8." What gives?