Hey Guix,

After my second attempt at doing so, I finally have a "working" build
for Polari.  As far as I'm aware, it needs to be installed in some
profile along with its propagated inputs (due to D-Bus) and there may
be some races due to honestly strange behaviour of telepathy-idle. 
However, I've been chatting with it on #guix for some while, so at
least that appears to function as intended.

Regards,
Leo