georgeharley (3) [Avatar] Offline
In section 13.1.2 Building RabbitMQ of MEAP v12 there are some commands given to configure the development RabbitMQ for plugins. One of the commands sets up symlinks from the rabbitmq-server/plugins folder to the contents of the rabbitmq-management/dist folder thus:

ln -s rabbitmq-management/dist/*.ez rabbitmq-server/plugins/

After carrying out the above I found that the subsequent call to scripts/rabbitmq-plugins list failed to display any of the expected plugins. This was on Fedora 22. The only way that I could get the plugins list to show up was to remove the symlinks and actually copy the *.ez files from rabbitmq-management/dist into rabbitmq-server/plugins. Perhaps Gavin hit this issue as well? Immediately after the symlink instruction the MEAP text goes on to say, "With the plugins copied into the directory..."

Hope this helps,