diff --git a/Data/StorableVector/Lazy.hs b/Data/StorableVector/Lazy.hs
--- a/Data/StorableVector/Lazy.hs
+++ b/Data/StorableVector/Lazy.hs
@@ -23,6 +23,7 @@
 
 import Foreign.Storable (Storable)
 
+import Data.Monoid (Monoid, mempty, mappend, mconcat, )
 -- import Control.Arrow ((***))
 import Control.Monad (liftM, liftM2, liftM3, liftM4, {- guard, -} )
 
@@ -36,7 +37,7 @@
 
 
 import Prelude hiding
-   (length, (++), iterate, foldl, map, repeat, replicate, null,
+   (length, (++), concat, iterate, foldl, map, repeat, replicate, null,
     zip, zipWith, zipWith3, drop, take, splitAt, takeWhile, dropWhile, reverse)
 
 import qualified Prelude as P
@@ -57,6 +58,12 @@
 {-# ONLINE chunks #-}
 
 newtype Vector a = SV {chunks :: [V.Vector a]}
+
+
+instance (Storable a) => Monoid (Vector a) where
+    mempty  = empty
+    mappend = append
+    mconcat = concat
 
 
 -- for a list of chunk sizes see "Data.StorableVector.LazySize".
diff --git a/storablevector.cabal b/storablevector.cabal
--- a/storablevector.cabal
+++ b/storablevector.cabal
@@ -1,5 +1,5 @@
 Name:                storablevector
-Version:             0.2.2
+Version:             0.2.3
 Category:            Data
 Synopsis:            Fast, packed, strict storable arrays with a list interface like ByteString
 Description:
@@ -16,17 +16,16 @@
     We do not provide advanced fusion optimization,
     since especially for lazy vectors
     this would either be incorrect or not applicable.
-    For fusion see @storablevector-stream@ package.
+    For fusion see @storablevector-streamfusion@ package.
 License:             BSD3
 License-file:        LICENSE
 Author:              Spencer Janssen <sjanssen@cse.unl.edu>, Henning Thielemann <storablevector@henning-thielemann.de>
 Maintainer:          Henning Thielemann <storablevector@henning-thielemann.de>
 Homepage:            http://www.haskell.org/haskellwiki/Storable_Vector
-Package-URL:         http://code.haskell.org/storablevector/
 Stability:           Experimental
 Build-Type:          Simple
 Tested-With:         GHC==6.8.2
-Cabal-Version:       >=1.2
+Cabal-Version:       >=1.6
 
 Flag splitBase
   description: Choose the new smaller, split-up base package.
@@ -35,13 +34,22 @@
   description: Build test executables
   default:     False
 
+Source-Repository head
+  type:     darcs
+  location: http://code.haskell.org/storablevector/
+
+Source-Repository this
+  type:     darcs
+  location: http://code.haskell.org/storablevector/
+  tag:      0.2.3
+
 Library
   Build-Depends:
     non-negative >= 0.0.4 && <0.1,
     utility-ht >= 0.0.5 && <0.1,
     transformers >=0.0 && <0.2
   If flag(splitBase)
-    Build-Depends: base >= 3
+    Build-Depends: base >= 3 && <5
   Else
     Build-Depends: base >= 1.0 && < 2
 
@@ -75,7 +83,7 @@
   Extensions:          CPP, ForeignFunctionInterface
   If flag(splitBase)
     Hs-Source-Dirs:    tests-2
-    Build-Depends:     base >= 3, random >= 1.0 && < 1.1
+    Build-Depends:     base >= 3 && <5, random >= 1.0 && < 1.1
   Else
     Hs-Source-Dirs:    tests-1
     Build-Depends:     base >= 1.0 && < 2
@@ -88,7 +96,7 @@
   Extensions:          CPP, ForeignFunctionInterface
   Hs-Source-Dirs:      ., slow-foreign-ptr, speedtest
   If flag(splitBase)
-    Build-Depends:     base >= 3
+    Build-Depends:     base >= 3 && <5
   Else
     Build-Depends:     base >= 1.0 && < 2
   If !flag(buildTests)