Need erlang to build membase's ns_server component.

component/erlang/buildout.cfg

+[buildout]
+parts =
+  erlang
+
+[erlang]
+recipe = hexagonit.recipe.cmmi
+url = http://www.erlang.org/download/otp_src_R14B03.tar.gz
+md5sum = 7979e662d11476b97c462feb7c132fb7

component/membase/buildout.cfg

@@ -2,6 +2,7 @@
 extends =
   ../curl/buildout.cfg
   ../libevent/buildout.cfg
+  ../erlang/buildout.cfg
 
 parts =
   membase-source
@@ -14,6 +15,7 @@ parts =
   membase-ep-engine
   membase-membase-cli
   membase-memcachetest
+  membase-ns_server
   membase-vbucketmigrator
 
 [membase]
@@ -124,6 +126,8 @@ patches =
 configure-command =
   ./configure
 component-configure-options =
+enivronement =
+  PATH=${erlang:location}/bin:%(PATH)s
 
 [membase-vbucketmigrator]
 <= membase-component-common