diff --git a/Program/Mighty/Process.hs b/Program/Mighty/Process.hs
--- a/Program/Mighty/Process.hs
+++ b/Program/Mighty/Process.hs
@@ -38,14 +38,13 @@
 ----------------------------------------------------------------
 
 runPS :: IO [PsResult]
-runPS = runResourceT $
-       sourceCmd "ps -ef"
-    $= CB.lines
-    $= CL.map BS.words
-    $= CL.map toPsResult
-    $= CL.filter mighty
-    $$ CL.consume
+runPS = snd <$> runResourceT (sourceCmdWithConsumer "ps -ef" consumer)
   where
+    consumer = CB.lines
+            $= CL.map BS.words
+            $= CL.map toPsResult
+            $= CL.filter mighty
+            $= CL.consume
     commandName = last . split '/' . command
     mighty ps = "mighty" `BS.isInfixOf` name
              && not ("mightyctl" `BS.isInfixOf` name)
diff --git a/mighttpd2.cabal b/mighttpd2.cabal
--- a/mighttpd2.cabal
+++ b/mighttpd2.cabal
@@ -1,5 +1,5 @@
 Name:                   mighttpd2
-Version:                3.1.1
+Version:                3.1.2
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3
@@ -51,7 +51,6 @@
                       , io-choice
                       , network
                       , parsec >= 3
-                      , process-conduit
                       , resourcet
                       , unix
                       , unix-time