Build fix for Windows

Distribution/Simple/Utils.hs

@@ -98,6 +98,10 @@ import System.Directory (getDirectoryContents, removeDirectory,
                         doesDirectoryExist, doesFileExist, removeFile,
                         createDirectory)
 
+#ifndef mingw32_TARGET_OS
+import System.Directory (getPermissions,setPermissions)
+#endif
+
 import Foreign.Marshal (allocaBytes)
 
 #ifndef mingw32_TARGET_OS