diff --git a/haskell-packages.cabal b/haskell-packages.cabal
--- a/haskell-packages.cabal
+++ b/haskell-packages.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                haskell-packages
-version:             0.6
+version:             0.6.1
 synopsis:            Haskell suite library for package management and integration with Cabal
 description:         See <http://documentup.com/haskell-suite/haskell-packages>
 license:             MIT
diff --git a/src/Distribution/HaskellSuite/Packages.hs b/src/Distribution/HaskellSuite/Packages.hs
--- a/src/Distribution/HaskellSuite/Packages.hs
+++ b/src/Distribution/HaskellSuite/Packages.hs
@@ -254,7 +254,9 @@
   cts <- LBS.fromChunks . return <$> BS.readFile path
     `E.catch` \e ->
       throwIO $ PkgDBReadError path e
-  maybe (throwIO $ BadPkgDB path) return $ decode cts
+  case decodeOrFail cts of
+    Left{} -> throwIO $ BadPkgDB path
+    Right (_rest, _offset, values) -> pure values
 
   where
     maybeDoInitDB