Wavpack support in Sox

[Kyle <kyle@xxxxxx>]

Having recently migrated from Ubuntu, I notice that while Ubuntu's Sox 
package didn't support encoding to mp3, it did support Wavpack encoding 
and decoding, whereas in Arch, it supports mp3 encoding, but Wavpack 
seems to be unsupported. Am I missing an add-on that will make Sox 
support Wavpack, or do I need to rebuild the package with Wavpack support?
~Kyle