trying to fix travis ci.

ghc-mod.cabal

@@ -156,6 +156,7 @@ Executable ghc-modi
                       , containers
                       , directory
                       , filepath
+                      , old-time
                       , process
                       , split
                       , time

src/Misc.hs

@@ -26,7 +26,11 @@ import CoreMonad (liftIO)
 import Data.IORef (IORef, newIORef, readIORef, writeIORef)
 import Data.List (isPrefixOf)
 import Data.Maybe (isJust)
+#if __GLASGOW_HASKELL__ <= 704
+import System.Time (ClockTime)
+#else
 import Data.Time (UTCTime)
+#endif
 import Data.Typeable (Typeable)
 import System.Directory (getModificationTime, doesDirectoryExist, getDirectoryContents)
 import System.IO (openBinaryFile, IOMode(..))
@@ -50,7 +54,11 @@ instance Exception Restart
 ----------------------------------------------------------------
 
 data World = World {
+#if __GLASGOW_HASKELL__ <= 704
+    worldCabalFileModificationTime :: Maybe ClockTime
+#else
     worldCabalFileModificationTime :: Maybe UTCTime
+#endif
   } deriving (Show, Eq)
 
 getCurrentWorld :: IOish m => GhcModT m World