diff --git a/Config.hs b/Config.hs
new file mode 100644
--- /dev/null
+++ b/Config.hs
@@ -0,0 +1,87 @@
+{-# LANGUAGE ScopedTypeVariables #-}
+
+module Config where
+ 
+import Control.Monad.Identity
+
+import Distribution.Simple
+import Distribution.Simple.Setup
+import Distribution.PackageDescription
+import Distribution.Simple.LocalBuildInfo
+
+import System.Exit
+import System.Process
+
+import Text.Parsec
+
+config :: LocalBuildInfo -> IO (Maybe HookedBuildInfo)
+config bInfo = do 
+  (excode, out, err) <- readProcessWithExitCode "root-config" ["--glibs"] ""
+  liboptset' <- case excode of 
+                  ExitSuccess -> do  
+--                    putStrLn $ show $ words out
+--                    putStrLn $ show $ libraryOptions (words out)
+--                    putStrLn $ show $ mkLibraryOptionSet . words $ out
+                    return . Just .  mkLibraryOptionSet . words $ out
+                  _ -> do 
+                    putStrLn $ "root-config failure but I am installing HROOT without ROOT. It will not work. This is only for documentation." 
+                    return Nothing              
+  (excode2,out2,err2) <- readProcessWithExitCode "root-config" ["--incdir"] ""
+  incdir' <- case excode2 of 
+               ExitSuccess -> do  
+--                 putStrLn $ out2
+                 return . Just . head . words $ out2
+               _ -> do 
+                 putStrLn $ "root-config failure but I am installing HROOT without ROOT. It will not work. This is only for documentation." 
+                 return Nothing
+  let Just lib = library . localPkgDescr $ bInfo
+      buildinfo = libBuildInfo lib
+  let (r :: Maybe HookedBuildInfo) = case liboptset' of 
+            Nothing -> Nothing
+            Just liboptset -> 
+              case incdir' of 
+                Nothing -> Nothing 
+                Just incdir -> 
+                  let hbi = emptyBuildInfo { extraLibs = extraLibs buildinfo 
+                                                         ++ libs liboptset
+                                           , extraLibDirs = libdirs liboptset 
+                                           , includeDirs = incdir : includeDirs buildinfo
+                                           }
+                  in Just (Just hbi, []) 
+--  putStrLn $ "show here"
+--  putStrLn $ show r
+  return r 
+
+
+data LibraryOptionSet = LibraryOptionSet { 
+  libs :: [String], 
+  libdirs :: [String], 
+  libopts :: [String]
+} deriving Show
+
+data LibraryOption = Lib String 
+                   | Dir String
+                   | Opt String 
+                   deriving Show
+
+mkLibraryOptionSet :: [String] -> LibraryOptionSet
+mkLibraryOptionSet strs = let opts = libraryOptions strs
+                          in  foldr f (LibraryOptionSet [] [] []) opts 
+  where f x (LibraryOptionSet l d o) = case x of
+                                         Lib st -> LibraryOptionSet (st:l) d o 
+                                         Dir st -> LibraryOptionSet l (st:d) o 
+                                         Opt st -> LibraryOptionSet l d (st:o) 
+
+libraryOptions :: [String] -> [LibraryOption] -- LibraryOptionSet 
+libraryOptions = map f 
+  where f x = let r = parse libraryOptionClassifier "" x
+              in  case r of 
+                    Left msg -> error (show msg)
+                    Right result -> result
+
+
+libraryOptionClassifier :: ParsecT String () Identity LibraryOption
+libraryOptionClassifier = 
+  try (string "-L" >> many1 anyChar >>= return . Dir) 
+  <|> try (string "-l" >> many1 anyChar >>= return . Lib)
+  <|> (many1 anyChar >>= return . Opt)
diff --git a/HROOT.cabal b/HROOT.cabal
--- a/HROOT.cabal
+++ b/HROOT.cabal
@@ -1,5 +1,5 @@
 Name:		HROOT
-Version:	0.5.0.0
+Version:	0.5.0.1
 Synopsis:	Wrapper for ROOT
 Description: 	Haskell FFI binding for ROOT  
 Homepage:       http://ianwookim.org/HROOT
@@ -11,7 +11,8 @@
 Tested-with:    GHC >= 7.0.2 && <= 7.0.3
 Build-Type: 	Custom
 cabal-version:  >=1.6
-Extra-source-files: csrc/HROOT.h
+Extra-source-files: Config.hs
+                    csrc/HROOT.h
                     csrc/addon.h
                     example/histadd.hs
                     example/random1d.hs