diff --git a/Config.hs b/Config.hs
new file mode 100644
--- /dev/null
+++ b/Config.hs
@@ -0,0 +1,85 @@
+{-# LANGUAGE ScopedTypeVariables #-}
+
+module Config where
+ 
+import Distribution.Simple
+import Distribution.Simple.Setup
+import Distribution.PackageDescription
+import Distribution.Simple.LocalBuildInfo
+
+import System.Exit
+import System.Process
+
+config :: LocalBuildInfo -> IO (Maybe HookedBuildInfo)
+config bInfo = do 
+  (excode, out, err) <- readProcessWithExitCode "root-config" ["--glibs"] ""
+  liboptset' <- case excode of 
+                  ExitSuccess -> do  
+                    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  
+                 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, []) 
+  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 = parseLibraryOptionClassifier x
+              in  case r of 
+                    Left msg -> error (show msg)
+                    Right result -> result
+
+
+parseLibraryOptionClassifier :: String -> Either String LibraryOption 
+parseLibraryOptionClassifier [] = Left "empty option"
+parseLibraryOptionClassifier str@(x:xs) = 
+  case x of
+    '-' -> if null xs 
+             then Left "parse error"
+             else let (y:ys) = xs
+                  in  case y of
+                        'L' -> Right (Dir ys)
+                        'l' -> Right (Lib ys)
+                        _ -> Right (Opt str)
+    _ -> Right (Opt str) 
+
diff --git a/HROOT-math.cabal b/HROOT-math.cabal
--- a/HROOT-math.cabal
+++ b/HROOT-math.cabal
@@ -1,5 +1,5 @@
 Name:                HROOT-math
-Version:     0.9
+Version:     0.9.0.1
 Synopsis:    Haskell binding to ROOT Math modules
 Description:         HROOT is a haskell Foreign Function Interface (FFI) binding to ROOT. ROOT(http://root.cern.ch) is an object-oriented program and library developed by CERN for physics data analysis.
 Homepage:       http://ianwookim.org/HROOT
@@ -12,6 +12,7 @@
 Build-Type:  Custom
 cabal-version:  >=1.10
 Extra-source-files:
+                       Config.hs
                        csrc/HROOTMathTRandom.h
                        csrc/HROOTMathTRandom.cpp