avoid build warning on windows

diff --git a/Utility/Tmp.hs b/Utility/Tmp.hs
index d442d8740d6640f439a659f2d4f8e6a8b74d0db1..f8be5b29c01d794bf830db63ed59fe9383665096 100644 (file)
--- a/Utility/Tmp.hs
+++ b/Utility/Tmp.hs
@@ -22,8 +22,10 @@ module Utility.Tmp (
 import System.IO
 import Control.Monad.IO.Class
 import System.IO.Error
+#ifndef mingw32_HOST_OS
 import Data.Char
 import qualified Data.ByteString as B
+#endif
 
 import Utility.Exception
 import Utility.FileSystemEncoding