<pre>
$ sudo pacman -Syu
....
resolving dependencies...
warning: cannot resolve "libxnvctrl", a dependency of "conky"
:: The following package cannot be upgraded due to unresolvable dependencies:
conky

$ pacman -Si conky | grep Depends
Depends On : glib2 lua wireless_tools libxdamage libxinerama libxft imlib2 libxml2 libpulse libxnvctrl
</pre>