diff --git a/creatur.cabal b/creatur.cabal
--- a/creatur.cabal
+++ b/creatur.cabal
@@ -1,5 +1,5 @@
 Name:              creatur
-Version:           5.6.8
+Version:           5.6.9
 Stability:         experimental
 Synopsis:          Framework for artificial life experiments.
 Description:       A software framework for automating experiments
@@ -36,7 +36,7 @@
 source-repository this
   type:     git
   location: https://github.com/mhwombat/creatur.git
-  tag:      5.6.8
+  tag:      5.6.9
 
 library
   GHC-Options:      -Wall -fno-warn-orphans
diff --git a/src/ALife/Creatur/Task.hs b/src/ALife/Creatur/Task.hs
--- a/src/ALife/Creatur/Task.hs
+++ b/src/ALife/Creatur/Task.hs
@@ -28,7 +28,8 @@
     startupHandler,
     shutdownHandler,
     exceptionHandler,
-    nothing
+    -- nothing,
+    requestShutdown
  ) where
 
 import ALife.Creatur.Daemon (Daemon(..))
@@ -128,8 +129,8 @@
     writeToLog "End of round"
     program
 
-nothing :: StateT u IO ()
-nothing = return ()
+-- nothing :: StateT u IO ()
+-- nothing = return ()
 
 -- Note: There's no reason for the checklist type to be a parameter of
 -- the Universe type. Users don't interact directly with it, so they