diff --git a/Data/IP/Addr.hs b/Data/IP/Addr.hs
--- a/Data/IP/Addr.hs
+++ b/Data/IP/Addr.hs
@@ -1,20 +1,21 @@
-{-# LANGUAGE CPP #-}
+{-# LANGUAGE DeriveDataTypeable #-}
+{-# LANGUAGE DeriveGeneric      #-}
 module Data.IP.Addr where
 
 import Control.Monad
 import Data.Bits
 import Data.Char
+import Data.Data (Data)
 import Data.List (foldl', intersperse)
 import Data.String
+import Data.Typeable (Typeable)
 import Data.Word
 import Network.Socket
 import Numeric (showHex, showInt)
 import System.ByteOrder
 import Text.Appar.String
 import GHC.Enum (succError,predError)
-#ifdef GENERICS
 import GHC.Generics
-#endif
 
 ----------------------------------------------------------------
 
@@ -30,9 +31,7 @@
 
 data IP = IPv4 { ipv4 :: IPv4 }
         | IPv6 { ipv6 :: IPv6 }
-#ifdef GENERICS
-        deriving (Generic)
-#endif
+        deriving (Data,Generic,Typeable)
 
 {-|
   Equality over IP addresses. Correctly compare IPv4 and IPv4-embedded-in-IPv6 addresses.
@@ -85,11 +84,7 @@
 192.0.2.1
 -}
 newtype IPv4 = IP4 IPv4Addr
-#ifdef GENERICS
-  deriving (Eq, Ord, Bounded, Generic)
-#else
-  deriving (Eq, Ord, Bounded)
-#endif
+  deriving (Eq, Ord, Bounded, Data, Generic, Typeable)
 
 {-|
   The abstract data type to express an IPv6 address.
@@ -111,11 +106,7 @@
 ::1
 -}
 newtype IPv6 = IP6 IPv6Addr
-#ifdef GENERICS
-  deriving (Eq, Ord, Bounded, Generic)
-#else
-  deriving (Eq, Ord, Bounded)
-#endif
+  deriving (Eq, Ord, Bounded, Data, Generic, Typeable)
 
 
 ----------------------------------------------------------------
diff --git a/Data/IP/Range.hs b/Data/IP/Range.hs
--- a/Data/IP/Range.hs
+++ b/Data/IP/Range.hs
@@ -1,16 +1,17 @@
-{-# LANGUAGE FlexibleInstances #-}
-{-# LANGUAGE CPP #-}
+{-# LANGUAGE DeriveDataTypeable #-}
+{-# LANGUAGE DeriveGeneric      #-}
+{-# LANGUAGE FlexibleInstances  #-}
 module Data.IP.Range where
 
 import Control.Monad
 import Data.Bits
+import Data.Data (Data)
 import Data.IP.Addr
 import Data.IP.Mask
 import Data.String
+import Data.Typeable (Typeable)
 import Text.Appar.String
-#ifdef GENERICS
 import GHC.Generics
-#endif
 
 ----------------------------------------------------------------
 
@@ -27,11 +28,7 @@
 
 data IPRange = IPv4Range { ipv4range :: AddrRange IPv4 }
              | IPv6Range { ipv6range :: AddrRange IPv6 }
-#ifdef GENERICS
-        deriving (Eq, Ord, Generic)
-#else
-        deriving (Eq, Ord)
-#endif
+        deriving (Eq, Ord, Data, Generic, Typeable)
 
 ----------------------------------------------------------------
 --
@@ -60,11 +57,7 @@
         -- |The 'mlen' function returns a mask length from 'AddrRange'.
       , mlen :: {-# UNPACK #-} !Int
     }
-#ifdef GENERICS
-    deriving (Eq, Ord, Generic)
-#else
-    deriving (Eq, Ord)
-#endif
+    deriving (Eq, Ord, Data, Generic, Typeable)
 
 ----------------------------------------------------------------
 --
diff --git a/iproute.cabal b/iproute.cabal
--- a/iproute.cabal
+++ b/iproute.cabal
@@ -1,5 +1,5 @@
 Name:                   iproute
-Version:                1.6.0
+Version:                1.7.0
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3
@@ -26,26 +26,19 @@
                         Data.IP.Op
                         Data.IP.Range
                         Data.IP.RouteTable.Internal
-  Build-Depends:        base >= 4 && < 5
+  Build-Depends:        base >= 4.6 && < 5
                       , appar
                       , byteorder
                       , containers
                       , network
 
-
-  if impl(ghc >= 7.2.1)
-    cpp-options:        -DGENERICS
-    default-extensions: DeriveGeneric
-  if impl(ghc >= 7.2.1) && impl(ghc < 7.6.1)
-    build-depends:      ghc-prim >= 0.2
-
 Test-Suite doctest
   Type:                 exitcode-stdio-1.0
   Default-Language:     Haskell2010
   HS-Source-Dirs:       test
   Ghc-Options:          -threaded -Wall
   Main-Is:              doctests.hs
-  Build-Depends:        base
+  Build-Depends:        base >= 4.6 && < 5
                       , doctest >= 0.9.3
 
 Test-Suite spec
@@ -56,7 +49,7 @@
   Main-Is:              Spec.hs
   Other-Modules:        RouteTableSpec
                       , IPSpec
-  Build-Depends:        base
+  Build-Depends:        base >= 4.6 && < 5
                       , hspec
                       , QuickCheck
                       , appar