--- a/modules/toplevel/manifests/worker/releng.pp
+++ b/modules/toplevel/manifests/worker/releng.pp
@@ -10,20 +10,18 @@ class toplevel::worker::releng inherits 
     include dirs::tools
     include packages::mozilla::python27
     include packages::mozilla::tooltool
     include packages::wget
     include packages::mozilla::py27_mercurial
     # TODO: run mig agent on boot?
     include mig::agent::daemon
 
-    # not sure why these are required on Darwin..
     if ($::operatingsystem == 'Darwin') {
         include packages::mozilla::py27_virtualenv
-        include buildslave::install
     }
 
     case $::kernel {
         'Linux': {
             # authorize aws-manager to reboot instances
             users::builder::extra_authorized_key {
                 'aws-ssh-key': ;
             }