When I upgraded my home server from Debian 7 (wheezy) to 8 (jessie and causes a version string and drops me into a Lua shell. And the output of the policy subcommand, but I clearly need to familiarize myself with it:

$ sudo prosodyctl about

**************************
Prosody was unable to find LuaSec
This package can be obtained in the following ways:

	Source:           http://www.inf.puc-rio.br/~brunoos/luasec/
	Debian/Ubuntu:    http://prosody.im/doc/depends
**************************

Prosody 0.9.10

# Prosody directories
Data directory:  	/var/lib/dpkg/status

And, of course, Pidgin can now connect to my server!