Debugging doesn't work on Byzantium
purism@pureos:~$ busctl set-property --user sm.puri.SqueekDebug /sm/puri/SqueekDebug sm.puri.SqueekDebug Enabled b true
Failed to set property Enabled on interface sm.puri.SqueekDebug: The name sm.puri.SqueekDebug was not provided by any .service files
Building from crates.io doesn't have this issue, so it's presumably related to Debian's patches to zbus and/or dependencies.
EDIT: seems debugging was not included in the latest release yet. Will be fixed with !17 (merged)