Fix building runghc on Windows

diff --git a/utils/runghc/runghc.hs b/utils/runghc/runghc.hs
index 5053858..911d0f8 100644 (file)
--- a/utils/runghc/runghc.hs
+++ b/utils/runghc/runghc.hs
@@ -32,6 +32,12 @@ import System.Exit
 import System.FilePath
 import System.IO
 
+#if defined(mingw32_HOST_OS)
+import Control.Monad
+import Foreign
+import Foreign.C.String
+#endif
+
 main :: IO ()
 main = do
     args <- getArgs