Note that ports-base is a mandatory collection and your ports will not

build correctly if it is not kept up to date.

Hopefully this will help with the flood of ".tar.gz" questions we've
been seeing everywhere lately.

share/examples/cvsup/ports-supfile

@@ -66,10 +66,15 @@ ports-all
 
 # These are the individual collections that make up "ports-all".  If you
 # use these, be sure to comment out "ports-all" above.
+#
+# Be sure to ALWAYS cvsup the ports-base collection if you use any of the
+# other individual collections below. ports-base is a mandatory collection
+# for the ports collection, and your ports may not build correctly if it
+# is not kept up to date.
+#ports-base
 #ports-archivers
 #ports-astro
 #ports-audio
-#ports-base
 #ports-benchmarks
 #ports-biology
 #ports-cad