Comment 1 for bug 1631529

agent-stream, unless set via --config, will default to "released". This is independent of what juju version the agent binaries are. It's always been this way. The idea is that if you want juju to search for a devel agent, you need to --config agent-stream=devel. The work around described in the bug report is actually what the required behaviour is - juju is working as designed. This allows the user to prevent juju from accidentally upgrading to a devel agent when the user wants juju to only look for released agents.