AidanDelaney/gubbins — pull request #1 by zamaudio (2014-04-06 13:15:15+00:00)
Title: Made RaXML a recommended package, not a dependency,

since standard-raxml will be built if it is not found.
Also, some HPC facilities have customised builds of RaXML
so it is not ideal to make the binary package a strict dependency.