diff --git a/Stackage2/PerformBuild.hs b/Stackage2/PerformBuild.hs
index 152025e9..17d2d7fb 100644
--- a/Stackage2/PerformBuild.hs
+++ b/Stackage2/PerformBuild.hs
@@ -214,17 +214,13 @@ singleBuild pb@PerformBuild {..} SingleBuild {..} =
         ]
 
     runIn wdir outH errH cmd args =
-        withCheckedProcess cp $ \ClosedStream out err -> do
-            void $ async $ out $$ sinkHandle outH
-            void $ async $ err $$ sinkHandle errH
+        withCheckedProcess cp $ \ClosedStream UseProvidedHandle UseProvidedHandle ->
             (return () :: IO ())
       where
         cp = (proc (unpack $ asText cmd) (map (unpack . asText) args))
             { cwd = Just $ fpToString wdir
-            {- FIXME UseProvidedHandle is broken
             , std_out = UseHandle outH
             , std_err = UseHandle errH
-            -}
             , env = Just sbModifiedEnv
             }
     runParent = runIn sbBuildDir
diff --git a/Stackage2/Prelude.hs b/Stackage2/Prelude.hs
index 45c3ec1f..a16a9721 100644
--- a/Stackage2/Prelude.hs
+++ b/Stackage2/Prelude.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE CPP                        #-}
 {-# LANGUAGE DeriveDataTypeable         #-}
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
 {-# LANGUAGE NoImplicitPrelude          #-}
@@ -59,45 +58,6 @@ data ParseFailedException = ParseFailedException TypeRep Text
     deriving (Show, Typeable)
 instance Exception ParseFailedException
 
-#ifndef MIN_VERSION_streaming_commons
-#define MIN_VERSION_streaming_commons(x, y, z) 1
-#endif
-#if !MIN_VERSION_streaming_commons(0,1,7)
-data ProcessExitedUnsuccessfully = ProcessExitedUnsuccessfully CreateProcess ExitCode
-    deriving Typeable
-instance Show ProcessExitedUnsuccessfully where
-    show (ProcessExitedUnsuccessfully cp ec) = concat
-        [ "Process exited with "
-        , show ec
-        , ": "
-        , showCmdSpec (cmdspec cp)
-        ]
-      where
-        showCmdSpec (ShellCommand str) = str
-        showCmdSpec (RawCommand x xs) = unwords (x:xs)
-instance Exception ProcessExitedUnsuccessfully
-
-checkExitCode :: MonadThrow m => CreateProcess -> ExitCode -> m ()
-checkExitCode _ ExitSuccess = return ()
-checkExitCode cp ec = throwM $ ProcessExitedUnsuccessfully cp ec
-
--- FIXME move into streaming-commons?
-withCheckedProcess :: ( InputSource stdin
-                      , OutputSink stderr
-                      , OutputSink stdout
-                      , MonadIO m
-                      )
-                   => CreateProcess
-                   -> (stdin -> stdout -> stderr -> m b)
-                   -> m b
-withCheckedProcess cp f = do
-    (x, y, z, sph) <- streamingProcess cp
-    res <- f x y z
-    ec <- waitForStreamingProcess sph
-    liftIO $ checkExitCode cp ec
-    return res
-#endif
-
 newtype Maintainer = Maintainer { unMaintainer :: Text }
     deriving (Show, Eq, Ord, Hashable, ToJSON, FromJSON, IsString)
 
diff --git a/stackage.cabal b/stackage.cabal
index fea6415c..2bf92a34 100644
--- a/stackage.cabal
+++ b/stackage.cabal
@@ -72,6 +72,7 @@ library
                      , stm
                      , mono-traversable
                      , async
+                     , streaming-commons >= 0.1.7.1
 
 executable stackage
   default-language:    Haskell2010