depends: Build qt package for FreeBSD hosts

depends/README.md

@@ -33,6 +33,10 @@ To build dependencies for the current arch+OS:
 
     pkg install bash cmake curl gmake
 
+Skip the following packages if you don't intend to use the GUI and will build with [`NO_QT=1`](#dependency-options):
+
+    pkg install bison ninja pkgconf python3
+
 To build dependencies for the current arch+OS:
 
     gmake