Mazer is experimental, and currently only available for tech-preview. Use with lots of caution! It is not intended for use in production environments, nor is it currently intended to replace the ansible-galaxy command-line tool.
Before installing roles with Mazer, review Using Content in Playbooks. Mazer installs content different from
Mazer is most useful when used with a version of Ansible that understands mazer installed content. Currently that means the ‘mazer_role_loader’ branch of ansible. See Installing the companion branch of ansible for details.