diff --git a/CHANGES b/CHANGES
deleted file mode 100644
--- a/CHANGES
+++ /dev/null
@@ -1,28 +0,0 @@
-1.2.1
-
-- Fix concurrency bug in Data.UUID.V1 (thanks to Neil Mitchell for reporting
-and a test case)
-
-1.2.0
-  (Contributors: Antoine Latter & Mark Lentczner)
-
-- added functions toByteString and fromByteString
-- added 'nil' UUID
-- added unit tests and benchmarks, built when configured -ftest
-- major speed up of to/from functions (as well as in general)
-- added version-3 generation (deterministic based on MD5)
-- major changes to internal representation
-	- now uses four strict Word32 values
-	- internal ByteSource classes for easy construction (see Builder.hs)
-- Storable instance now stores in memory as system libraries in C do:
-    16 bytes derived from the network order of the fields, no matter what
-    the host native endianess is.
-- fixed bugs in V1 time and clock stepping, and V1 generated values
-- builds cleanly under GHC's -Wall
-- added CHANGES file
-
-1.1.1
-
-- no longer exporting 'null' from the prelude
-- add 'null' predicate on UUIDs
-- documentation fix (thanks Mark Lentczner)
diff --git a/CHANGES.md b/CHANGES.md
new file mode 100644
--- /dev/null
+++ b/CHANGES.md
@@ -0,0 +1,186 @@
+1.3.16
+
+- Support GHC-8.6.5...9.10.1
+
+1.3.15
+
+- Add (Template Haskell) `Lift UUID` instance
+
+1.3.14
+
+- Use more compact heap object representation which saves 16 bytes on 64bit platforms.
+- Add `toWords64`/`fromWords64` functions
+
+1.3.13
+
+- Optimize `V4.nextRandom` (~3x speed increase)
+- Optimize UUID V3 & V5 generation (~2x speed increase)
+- Use `cryptohash-md5`/`cryptohash-sha1`/`entropy` instead
+  of `memory`/`cryptonite` for better performance and stability,
+  but GHCJS is now no longer supported.
+- Update cabal-spec to version 1.10
+
+1.3.12
+
+- Update package dependencies
+- Use `cryptonite` for crypto
+- The function `V4.nextRandom` is now implemented with functions from
+  `Crypto.Random` in package `cryptonite`. This does slow-down random
+  UUID generation but provides for far greater randomness. The
+  `Random` instance for `UUID` can be used to re-gain the old
+  behavior.
+
+1.3.11
+
+- Add `toText`/`fromText`
+
+1.3.10
+
+- Update dependencies in tests and benchmarks.
+
+1.3.9
+
+- Split definition of UUID data type into separate Cabal package to
+  enable 3rd party libraries to avoid some of the larger dependencies.
+
+1.3.8
+
+- Allow building against newer `deepseq`.
+
+1.3.7
+
+- Allow building against newer `time`.
+
+1.3.6
+
+- Move to GitHub.
+
+1.3.5
+
+- Allow building against newer `random`.
+
+1.3.4
+
+- Allow building against newer `QuickCheck`.
+
+1.3.3
+
+- More complex version constraints on `hashable`, to avoid building against
+  versions less than 1.1.1.0 or equal to 1.2.0.*.
+
+1.3.2
+
+- Fix for building against `bytestring` 0.9.*
+
+1.3.1
+
+- Allow building against `hashable` 1.1.* in addition to 1.2.*
+
+1.3.0
+
+- New functions for parsing and printing UUIDs to and from ASCII BytesStrings
+- New module `Data.UUID.Util`. This module includes the type `UnpackedUUID`,
+  whose fields correspond to the UUID fields described in RFC 4122.
+- The `Storable` instance now stores a UUID in host byte-order instead of
+  big endian.
+- There is now an instance for `Hashable UUID`.
+
+1.2.13
+
+Benchmark only changes:
+
+- Allow `criterion` 0.8.*
+
+1.2.12
+
+Test only changes:
+
+- Allow `QuickCheck` 2.6.*
+
+1.2.11
+
+- Allow `binary` 0.7.*
+
+1.2.10
+
+- Allow `cryptohash` version 0.9.*
+- Cleanup tests
+
+1.2.9
+
+- Bumped dependency on `cryptohash`.
+
+1.2.8
+
+- Bumped various dependencies and cleaned up dependencies in general.
+
+1.2.7
+
+- Added stricter constraints on `random` package.
+
+1.2.6
+
+- Add module `V4` to direct attention to our Random instance
+
+- In module `V1` seed the generator with a random number
+  if the hardware MAC address could not be discovered.
+
+- Fix and cleanup various haddocks.
+
+- In module docs, warn about MD5 use in Data.UUID.V3 and
+  encourage the reader to use Data.UUID.V5 instead.
+
+1.2.5
+
+- Use `cryptohash` package for MD5 and SHA1 instead of `Crypto`
+
+1.2.4
+
+- Unpack Word32 values into UUID constructor.
+
+- Update test suite to QuickCheck 2
+
+- Bump other dependencies in tests/benchmarks
+
+1.2.3
+
+- The Read instance now drops leading spaces in the string to be parsed.
+Thanks to Marc Ziegert for reporting this bug.
+
+- The tests have moved over to the new Cabal test running framework.
+
+1.2.2
+
+- Add functions fromWords/toWords
+
+The goal was to have a total function that can be used to construct
+a UUID, primarily for use by uuid-th.
+
+1.2.1
+
+- Fix concurrency bug in Data.UUID.V1 (thanks to Neil Mitchell for reporting
+and a test case)
+
+1.2.0
+  (Contributors: Antoine Latter & Mark Lentczner)
+
+- added functions toByteString and fromByteString
+- added `nil` UUID
+- added unit tests and benchmarks, built when configured -ftest
+- major speed up of to/from functions (as well as in general)
+- added version-3 generation (deterministic based on MD5)
+- major changes to internal representation
+	- now uses four strict Word32 values
+	- internal ByteSource classes for easy construction (see Builder.hs)
+- Storable instance now stores in memory as system libraries in C do:
+    16 bytes derived from the network order of the fields, no matter what
+    the host native endianess is.
+- fixed bugs in V1 time and clock stepping, and V1 generated values
+- builds cleanly under GHC's -Wall
+- added CHANGES file
+
+1.1.1
+
+- no longer exporting `null` from the prelude
+- add `null` predicate on UUIDs
+- documentation fix (thanks Mark Lentczner)
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
deleted file mode 100644
--- a/CONTRIBUTORS
+++ /dev/null
@@ -1,6 +0,0 @@
-In order of appearance:
-
-Antoine Latter
-Jason Dusek
-Tim Newsham
-Mark Lentczner
diff --git a/Data/UUID.hs b/Data/UUID.hs
deleted file mode 100644
--- a/Data/UUID.hs
+++ /dev/null
@@ -1,36 +0,0 @@
--- |
--- Module      : Data.UUID
--- Copyright   : (c) 2008 Antoine Latter
---
--- License     : BSD-style
---
--- Maintainer  : aslatter@gmail.com
--- Stability   : experimental
--- Portability : portable
--- 
--- 
--- This library is useful for comparing, parsing and
--- printing Universally Unique Identifiers.
--- See <http://en.wikipedia.org/wiki/UUID> for the general idea.
--- See <http://tools.ietf.org/html/rfc4122> for the specification.
---
--- For generating UUIDs, check out 'Data.UUID.V1', 'Data.UUID.V5' and
--- 'System.Random'.
-
-module Data.UUID(UUID
-                ,toString
-                ,fromString
-                ,toByteString
-                ,fromByteString
-                ,toWords
-                ,fromWords
-                ,null
-                ,nil
-                ) where
-
-import Prelude hiding (null)
-import Data.UUID.Internal
-
--- Everything is really implemented in Data.UUID.Internal,
--- but I don't want to export the constructors out of the
--- package.
diff --git a/Data/UUID/Builder.hs b/Data/UUID/Builder.hs
deleted file mode 100644
--- a/Data/UUID/Builder.hs
+++ /dev/null
@@ -1,88 +0,0 @@
-{-# LANGUAGE TypeFamilies #-}
-
--- Module      : Data.UUID.Builder
--- Copyright   : (c) 2009 Mark Lentczner
---
--- License     : BSD-style
---
--- Maintainer  : markl@glyphic.com
--- Stability   : experimental
--- Portability : portable
---
--- This module provides a system that can call a function that takes
--- a sequence of some number of Word8 arguments. 
--- 
--- The twist is that the Word8 arguments can be supplied directly
--- from Word8s, or from other sources that may provide more than
--- one Word8 apiece. Examples are Word16 and Word32 that supply
--- two and four Word8s respectively. Other ByteSource instances
--- can be defined.
--- 
--- This module is admittedly overkill. There are only three places
--- in the uuid package that need to call buildFromBytes with 16
--- Word8 values, but each place uses Words of different lengths:
---      version 1 uuids: 32-16-16-16-8-8-8-8-8-8
---      version 4 uuids: 24-24-32-24-24
---      version 5 uuids: 32-32-32-32
--- Originally, these three constructions were hand coded but the
--- code was ungainly. Using this module makes the code very
--- concise, and turns out to optimize to just as fast, or faster!
-
-module Data.UUID.Builder
-    (ByteSource(..)
-    ,ByteSink
-    ,Takes1Byte
-    ,Takes2Bytes
-    ,Takes3Bytes
-    ,Takes4Bytes
-    ) where
-
-import Data.Bits
-import Data.Word
-
-
-
-type Takes1Byte  g = Word8 -> g
-type Takes2Bytes g = Word8 -> Word8 -> g
-type Takes3Bytes g = Word8 -> Word8 -> Word8 -> g
-type Takes4Bytes g = Word8 -> Word8 -> Word8 -> Word8 -> g
-
--- | Type of function that a given ByteSource needs.
--- This function must take as many Word8 arguments as the ByteSource provides
-type family ByteSink w g
-type instance ByteSink Word8  g = Takes1Byte g
-type instance ByteSink Word16 g = Takes2Bytes g
-type instance ByteSink Word32 g = Takes4Bytes g
-type instance ByteSink Int    g = Takes4Bytes g
-
-
--- | Class of types that can add Word8s to a Builder.
--- Instances for Word8, Word16, Word32 and Int provide 1, 2, 4 and 4 bytes,
--- respectively, into a ByteSink
-class ByteSource w where
-    -- | Apply the source's bytes to the sink
-    (/-/) :: ByteSink w g -> w -> g
-
-infixl 6 /-/
-
-instance ByteSource Word8 where
-    f /-/ w = f w
-
-instance ByteSource Word16 where
-    f /-/ w = f b1 b2
-        where b1 = fromIntegral (w `shiftR` 8)
-              b2 = fromIntegral w
-
-instance ByteSource Word32 where
-    f /-/ w = f b1 b2 b3 b4
-        where b1 = fromIntegral (w `shiftR` 24)
-              b2 = fromIntegral (w `shiftR` 16)
-              b3 = fromIntegral (w `shiftR` 8)
-              b4 = fromIntegral w
-
-instance ByteSource Int where
-    f /-/ w = f b1 b2 b3 b4
-        where b1 = fromIntegral (w `shiftR` 24)
-              b2 = fromIntegral (w `shiftR` 16)
-              b3 = fromIntegral (w `shiftR` 8)
-              b4 = fromIntegral w
diff --git a/Data/UUID/Internal.hs b/Data/UUID/Internal.hs
deleted file mode 100644
--- a/Data/UUID/Internal.hs
+++ /dev/null
@@ -1,309 +0,0 @@
-{-# LANGUAGE DeriveDataTypeable, TypeFamilies, CPP #-}
-
--- |
--- Module      : Data.UUID
--- Copyright   : (c) 2008-2009 Antoine Latter
---               (c) 2009 Mark Lentczner
---
--- License     : BSD-style
---
--- Maintainer  : aslatter@gmail.com
--- Stability   : experimental
--- Portability : portable
-
-module Data.UUID.Internal
-    (UUID(..)
-    ,null
-    ,nil
-    ,fromByteString
-    ,toByteString
-    ,fromString
-    ,toString
-    ,fromWords
-    ,toWords
-    ,buildFromBytes
-    ,buildFromWords
-    ) where
-
-import Prelude hiding (null)
-import qualified Prelude
-
-import Control.Monad (liftM4)
-import Data.Char
-import Data.Maybe
-import Data.Bits
-import Data.List (elemIndices)
-
-#if MIN_VERSION_base(4,0,0)
-import Data.Data
-#else
-import Data.Generics.Basics
-#endif
-
-import Foreign.Storable
-
-import Data.Binary
-import Data.Binary.Put
-import Data.Binary.Get
-import qualified Data.ByteString.Lazy as Lazy
-
-import Data.UUID.Builder
-
-import System.Random
-
-
--- |The UUID type.  A 'Random' instance is provided which produces
--- version 4 UUIDs as specified in RFC 4122.  The 'Storable' and
--- 'Binary' instances are compatible with RFC 4122, storing the fields
--- in network order as 16 bytes.
-data UUID = UUID !Word32 !Word32 !Word32 !Word32
-    deriving (Eq, Ord, Typeable)
-{-
-    Other representations that we tried are:
-         Mimic V1 structure:     !Word32 !Word16 !Word16 !Word16
-                                   !Word8 !Word8 !Word8 !Word8 !Word8 !Word8
-         Sixteen bytes:          !Word8 ... (x 16)
-         Simple list of bytes:   [Word8]
-         ByteString (strict)     ByteString
-         Immutable array:        UArray Int Word8
-         Vector:                 UArr Word8
-    None was as fast, overall, as the representation used here.
--}
-
--- | Covert a 'UUID' into a sequence of 'Word32' values.
--- Usefull for when you need to serialize a UUID and
--- neither 'Storable' nor 'Binary' are appropriate. 
-toWords :: UUID -> (Word32, Word32, Word32, Word32)
-toWords (UUID w1 w2 w3 w4) = (w1, w2, w3, w4)
-
--- | Create a 'UUID' from a sequence of 'Word32'. The
--- opposite of 'toWords'.
-fromWords :: Word32 -> Word32 -> Word32 -> Word32 -> UUID
-fromWords = UUID
-
---
--- UTILITIES
---
-
--- |Build a Word32 from four Word8 values, presented in big-endian order
-word :: Word8 -> Word8 -> Word8 -> Word8 -> Word32
-word a b c d =  (fromIntegral a `shiftL` 24)
-            .|. (fromIntegral b `shiftL` 16)
-            .|. (fromIntegral c `shiftL`  8)
-            .|. (fromIntegral d            )
-
--- |Extract a Word8 from a Word32. Bytes, high to low, are numbered from 3 to 0,
-byte :: Int -> Word32 -> Word8
-byte i w = fromIntegral (w `shiftR` (i * 8))
-
-
--- |Make a UUID from sixteen Word8 values
-makeFromBytes :: Word8 -> Word8 -> Word8 -> Word8
-              -> Word8 -> Word8 -> Word8 -> Word8
-              -> Word8 -> Word8 -> Word8 -> Word8
-              -> Word8 -> Word8 -> Word8 -> Word8
-              -> UUID
-makeFromBytes b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 ba bb bc bd be bf
-        = UUID w0 w1 w2 w3
-    where w0 = word b0 b1 b2 b3
-          w1 = word b4 b5 b6 b7
-          w2 = word b8 b9 ba bb
-          w3 = word bc bd be bf
-
--- |Make a UUID from four Word32 values
-makeFromWords :: Word32 -> Word32 -> Word32 -> Word32 -> UUID
-makeFromWords = UUID
-
--- |A Builder for constructing a UUID of a given version.
-buildFromBytes :: Word8
-               -> Word8 -> Word8 -> Word8 -> Word8
-               -> Word8 -> Word8 -> Word8 -> Word8
-               -> Word8 -> Word8 -> Word8 -> Word8
-               -> Word8 -> Word8 -> Word8 -> Word8
-               -> UUID
-buildFromBytes v b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 ba bb bc bd be bf =
-    makeFromBytes b0 b1 b2 b3 b4 b5 b6' b7 b8' b9 ba bb bc bd be bf
-    where b6' = b6 .&. 0x0f .|. (v `shiftL` 4)
-          b8' = b8 .&. 0x3f .|. 0x80
-
--- |Build a UUID of a given version from Word32 values.
-buildFromWords :: Word8 -> Word32 -> Word32 -> Word32 -> Word32 -> UUID
-buildFromWords v w0 w1 w2 w3 = makeFromWords w0 w1' w2' w3
-    where w1' = w1 .&. 0xffff0fff .|. ((fromIntegral v) `shiftL` 12)
-          w2' = w2 .&. 0x3fffffff .|. 0x80000000
-
-
--- |Return the bytes that make up the UUID
-toList :: UUID -> [Word8]
-toList (UUID w0 w1 w2 w3) =
-    [byte 3 w0, byte 2 w0, byte 1 w0, byte 0 w0,
-     byte 3 w1, byte 2 w1, byte 1 w1, byte 0 w1,
-     byte 3 w2, byte 2 w2, byte 1 w2, byte 0 w2,
-     byte 3 w3, byte 2 w3, byte 1 w3, byte 0 w3]
-
--- |Construct a UUID from a list of Word8. Returns Nothing if the list isn't
--- exactly sixteen bytes long
-fromList :: [Word8] -> Maybe UUID
-fromList [b0, b1, b2, b3, b4, b5, b6, b7, b8, b9, ba, bb, bc, bd, be, bf] =
-    Just $ makeFromBytes b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 ba bb bc bd be bf
-fromList _ = Nothing
-
-
---
--- UUID API
---
-
--- |Returns true if the passed-in UUID is the 'nil' UUID.
-null :: UUID -> Bool
-null = (== nil)
-    -- Note: This actually faster than:
-    --      null (UUID 0 0 0 0) = True
-    --      null _              = False
-
--- |The nil UUID, as defined in RFC 4122.
--- It is a UUID of all zeros. @'null' u@ iff @'u' == 'nil'@.
-nil :: UUID
-nil = UUID 0 0 0 0
-
--- |Extract a UUID from a 'ByteString' in network byte order.
--- The argument must be 16 bytes long, otherwise 'Nothing' is returned.
-fromByteString :: Lazy.ByteString -> Maybe UUID
-fromByteString = fromList . Lazy.unpack
-
--- |Encode a UUID into a 'ByteString' in network order.
-toByteString :: UUID -> Lazy.ByteString
-toByteString = Lazy.pack . toList
-
--- |If the passed in 'String' can be parsed as a 'UUID', it will be.
--- The hyphens may not be omitted.
--- Example:
---
--- @
---  fromString \"c2cc10e1-57d6-4b6f-9899-38d972112d8c\"
--- @
---
--- Hex digits may be upper or lower-case.
-fromString :: String -> Maybe UUID
-fromString xs | validFmt  = fromString' xs
-              | otherwise = Nothing
-  where validFmt = elemIndices '-' xs == [8,13,18,23]
-
-fromString' :: String -> Maybe UUID
-fromString' s0 = do
-    (w0, s1) <- hexWord s0
-    (w1, s2) <- hexWord s1
-    (w2, s3) <- hexWord s2
-    (w3, s4) <- hexWord s3
-    if s4 /= "" then Nothing
-                else Just $ UUID w0 w1 w2 w3
-    where hexWord :: String -> Maybe (Word32, String)
-          hexWord s = Just (0, s) >>= hexByte >>= hexByte
-                                  >>= hexByte >>= hexByte
-
-          hexByte :: (Word32, String) -> Maybe (Word32, String)
-          hexByte (w, '-':ds) = hexByte (w, ds)
-          hexByte (w, hi:lo:ds)
-              | bothHex   = Just ((w `shiftL` 8) .|. octet, ds)
-              | otherwise = Nothing
-              where bothHex = isHexDigit hi && isHexDigit lo
-                    octet = fromIntegral (16 * digitToInt hi + digitToInt lo)
-          hexByte _ = Nothing
-
--- | Convert a UUID into a hypenated string using lower-case letters.
--- Example:
---
--- @
---  toString $ fromString \"550e8400-e29b-41d4-a716-446655440000\"
--- @
-toString :: UUID -> String
-toString (UUID w0 w1 w2 w3) = hexw w0 $ hexw' w1 $ hexw' w2 $ hexw w3 ""
-    where hexw :: Word32 -> String -> String
-          hexw  w s = hexn w 28 : hexn w 24 : hexn w 20 : hexn w 16
-                    : hexn w 12 : hexn w  8 : hexn w  4 : hexn w  0 : s
-
-          hexw' :: Word32 -> String -> String
-          hexw' w s = '-' : hexn w 28 : hexn w 24 : hexn w 20 : hexn w 16
-                    : '-' : hexn w 12 : hexn w  8 : hexn w  4 : hexn w  0 : s
-
-          hexn :: Word32 -> Int -> Char
-          hexn w r = intToDigit $ fromIntegral ((w `shiftR` r) .&. 0xf)
-
-
---
--- Class Instances
---
-
-instance Random UUID where
-    random g = (fromGenNext w0 w1 w2 w3 w4, g4)
-        where (w0, g0) = next g
-              (w1, g1) = next g0
-              (w2, g2) = next g1
-              (w3, g3) = next g2
-              (w4, g4) = next g3
-    randomR _ = random -- range is ignored
-
--- |Build a UUID from the results of five calls to next on a StdGen.
--- While next on StdGet returns an Int, it doesn't provide 32 bits of
--- randomness. This code relies on at last 28 bits of randomness in the
--- and optimizes its use so as to make only five random values, not six.
-fromGenNext :: Int -> Int -> Int -> Int -> Int -> UUID
-fromGenNext w0 w1 w2 w3 w4 =
-    buildFromBytes 4 /-/ (ThreeByte w0)
-                     /-/ (ThreeByte w1)
-                     /-/ w2    -- use all 4 bytes because we know the version
-                               -- field will "cover" the upper, non-random bits
-                     /-/ (ThreeByte w3)
-                     /-/ (ThreeByte w4)
-
--- |A ByteSource to extract only three bytes from an Int, since next on StdGet
--- only returns 31 bits of randomness.
-type instance ByteSink ThreeByte g = Takes3Bytes g
-newtype ThreeByte = ThreeByte Int
-instance ByteSource ThreeByte where
-    f /-/ (ThreeByte w) = f b1 b2 b3
-        where b1 = fromIntegral (w `shiftR` 16)
-              b2 = fromIntegral (w `shiftR` 8)
-              b3 = fromIntegral w
-
-
-instance Show UUID where
-    show = toString
-
-instance Read UUID where
-    readsPrec _ str = case fromString (take 36 str) of
-      Nothing -> []
-      Just u  -> [(u,drop 36 str)]
-
-
-instance Storable UUID where
-    sizeOf _ = 16
-    alignment _ = 1 -- UUIDs are stored as individual octets
-
-    peekByteOff p off =
-      mapM (peekByteOff p) [off..(off+15)] >>= return . fromJust . fromList 
-
-    pokeByteOff p off u =
-      sequence_ $ zipWith (pokeByteOff p) [off..] (toList u)
-
-
-instance Binary UUID where
-    put (UUID w0 w1 w2 w3) =
-        putWord32be w0 >> putWord32be w1 >> putWord32be w2 >> putWord32be w3 
-    get = liftM4 UUID getWord32be getWord32be getWord32be getWord32be
-
-
--- My goal with this instance was to make it work just enough to do what
--- I want when used with the HStringTemplate library.
-instance Data UUID where
-    toConstr uu  = mkConstr uuidType (show uu) [] (error "fixity")
-    gunfold _ _  = error "gunfold"
-    dataTypeOf _ = uuidType
-
-uuidType :: DataType
-uuidType =  mkNoRepType "Data.UUID.UUID"
-
-#if !(MIN_VERSION_base(4,2,0))
-mkNoRepType :: String -> DataType
-mkNoRepType = mkNorepType
-#endif
-
diff --git a/Data/UUID/Named.hs b/Data/UUID/Named.hs
deleted file mode 100644
--- a/Data/UUID/Named.hs
+++ /dev/null
@@ -1,67 +0,0 @@
--- |
--- Module      : Data.UUID.Named
--- Copyright   : (c) 2008 Antoine Latter
---
--- License     : BSD-style
---
--- Maintainer  : aslatter@gmail.com
--- Stability   : experimental
--- Portability : portable
---
---
--- This module implements Version 3/5 UUIDs as specified
--- in RFC 4122.
---
--- These UUIDs identify an object within a namespace,
--- and are deterministic.
---
--- The namespace is identified by a UUID.  Several sample
--- namespaces are enclosed.
-
-module Data.UUID.Named
-    (generateNamed
-    ,namespaceDNS
-    ,namespaceURL
-    ,namespaceOID
-    ,namespaceX500
-    ) where
-
-import Data.UUID.Internal
-
-import Data.Binary
-import Data.Maybe
-
-import qualified Data.ByteString.Lazy as BS
-
--- |Generate a 'UUID' within the specified namespace out of the given
--- object.
-generateNamed :: ([Word8] -> (Word32, Word32, Word32, Word32)) -- ^Hash
-              -> Word8   -- ^Version
-              ->  UUID   -- ^Namespace
-              -> [Word8] -- ^Object
-              -> UUID
-generateNamed hash version namespace object =
-    let chunk = BS.unpack (toByteString namespace) ++ object
-        (w1, w2, w3, w4) = hash chunk
-    in buildFromWords version w1 w2 w3 w4
-
-
-
-unsafeFromString :: String -> UUID
-unsafeFromString = fromJust . fromString
-
--- |The namespace for DNS addresses
-namespaceDNS :: UUID
-namespaceDNS = unsafeFromString "6ba7b810-9dad-11d1-80b4-00c04fd430c8"
-
--- |The namespace for URLs
-namespaceURL :: UUID
-namespaceURL = unsafeFromString "6ba7b811-9dad-11d1-80b4-00c04fd430c8"
-
--- |The namespace for ISO OIDs
-namespaceOID :: UUID
-namespaceOID = unsafeFromString "6ba7b812-9dad-11d1-80b4-00c04fd430c8"
-
--- |The namespace for X.500 DNs
-namespaceX500 :: UUID
-namespaceX500 = unsafeFromString "6ba7b814-9dad-11d1-80b4-00c04fd430c8"
diff --git a/Data/UUID/V1.hs b/Data/UUID/V1.hs
deleted file mode 100644
--- a/Data/UUID/V1.hs
+++ /dev/null
@@ -1,107 +0,0 @@
-{-# OPTIONS_GHC -fno-cse #-}
-{-# LANGUAGE TypeFamilies #-}
-
--- |
--- Module      : Data.UUID.V1
--- Copyright   : (c) 2008 Jason Dusek
---               (c) 2009 Mark Lentczner
---               (c) 2009-2010 Antoine Latter
---
--- License     : BSD-style
---
--- Maintainer  : aslatter@gmail.com
--- Stability   : experimental
--- Portability : portable
---
--- RFC 4122 Version 1 UUID state machine.
-
-module Data.UUID.V1(nextUUID)
-where
-
-import Data.Time
-
-import Data.Bits
-import Data.Word
-
-import Control.Concurrent.MVar
-import System.IO
-import System.IO.Unsafe
-
-import qualified System.Info.MAC as SysMAC
-import Data.MAC
-
-import Data.UUID.Builder
-import Data.UUID.Internal
-
--- | Returns a new UUID derived from the local hardware MAC
--- address and the current system time.
--- Is generated according to the Version 1 UUID sepcified in
--- RFC 4122.
---
--- Returns nothing if the hardware MAC address could not
--- be discovered.
-nextUUID :: IO (Maybe UUID)
-nextUUID = do
-  res <- stepTime
-  mac <- SysMAC.mac
-  case (res, mac) of
-    (Just (c, t), Just m) -> return $ Just $ makeUUID t c m
-    _ -> return Nothing
-
-
-makeUUID :: Word64 -> Word16 -> MAC -> UUID
-makeUUID time clock mac =
-    buildFromBytes 1 /-/ tLow /-/ tMid /-/ tHigh /-/ clock /-/ (MACSource mac)
-    where tLow = (fromIntegral time) :: Word32
-          tMid = (fromIntegral (time `shiftR` 32)) :: Word16
-          tHigh = (fromIntegral (time `shiftR` 48)) :: Word16  
-
-newtype MACSource = MACSource MAC
-instance ByteSource MACSource where
-    z /-/ (MACSource (MAC a b c d e f)) = z a b c d e f
-type instance ByteSink MACSource g = Takes3Bytes (Takes3Bytes g)
-
-
--- |Approximates the clock algorithm in RFC 4122, section 4.2
--- Isn't system wide or thread safe, nor does it properly randomize
--- the clock value on initialization.
-stepTime :: IO (Maybe (Word16, Word64))
-stepTime = do
-  h1 <- fmap hundredsOfNanosSinceGregorianReform getCurrentTime
-  modifyMVar state $ \s@(State c0 h0) ->
-   if h1 > h0
-    then
-      return (State c0 h1, Just (c0, h1))
-    else
-      let
-        c1 = succ c0
-      in if c1 <= 0x3fff -- when clock is initially randomized,
-                      -- then this test will need to change
-         then
-          return (State c1 h1, Just (c1, h1))
-        else
-          return (s, Nothing)
-
-
-{-# NOINLINE state #-}
-state :: MVar State
-state = unsafePerformIO $ do
-  h0 <- fmap hundredsOfNanosSinceGregorianReform getCurrentTime
-  newMVar $ State 0 h0 -- the 0 should be a random number
-
-
-data State = State
-    {-# UNPACK #-} !Word16
-    {-# UNPACK #-} !Word64
- deriving (Show)
-
-
-
-hundredsOfNanosSinceGregorianReform :: UTCTime -> Word64
-hundredsOfNanosSinceGregorianReform t = floor $ 10000000 * dt
- where
-  gregorianReform = UTCTime (fromGregorian 1582 10 15) 0
-  dt = t `diffUTCTime` gregorianReform
-
-
-
diff --git a/Data/UUID/V3.hs b/Data/UUID/V3.hs
deleted file mode 100644
--- a/Data/UUID/V3.hs
+++ /dev/null
@@ -1,67 +0,0 @@
--- |
--- Module      : Data.UUID.V3
--- Copyright   : (c) 2010 Antoine Latter
---
--- License     : BSD-style
---
--- Maintainer  : aslatter@gmail.com
--- Stability   : experimental
--- Portability : portable
---
---
--- This module implements Version 3 UUIDs as specified
--- in RFC 4122.
---
--- These UUIDs identify an object within a namespace,
--- and are deterministic.
---
--- The namespace is identified by a UUID.  Several sample
--- namespaces are enclosed.
-
-module Data.UUID.V3
-    (generateNamed
-    ,Shared.namespaceDNS
-    ,Shared.namespaceURL
-    ,Shared.namespaceOID
-    ,Shared.namespaceX500
-    ) where
-
-import Data.Word
-import Data.Bits
-
-import Data.UUID.Internal
-import qualified Data.UUID.Named as Shared
-import qualified Data.Digest.MD5 as MD5
-
-
--- |Generate a 'UUID' within the specified namespace out of the given
--- object.
---
--- Uses an MD5 hash. The UUID is built from first 128 bits of the hash of
--- the namespace UUID and the name (as a series of Word8).
-generateNamed :: UUID    -- ^Namespace
-              -> [Word8] -- ^Object
-              -> UUID
-generateNamed = Shared.generateNamed hash 3
-
-hash :: [Word8] -> (Word32, Word32, Word32, Word32)
-hash bytes
-    = case map f $ chunk 4 $ MD5.hash bytes of
-        w1:w2:w3:w4:_ -> (w1, w2, w3, w4)
-        _ -> error "Data.UUID.V3.hash: fatal error"
-
- where f [b1, b2, b3, b4]
-           = sum
-             [ fromIntegral b4
-             , fromIntegral b3 `shiftL` 8
-             , fromIntegral b2 `shiftL` 16
-             , fromIntegral b1 `shiftL` 24
-             ]
-       f _ = error "Data.UUID.V3.hash: fatal error"
-
-chunk :: Int -> [a] -> [[a]]
-chunk n = go n []
- where go _ [] [] = []
-       go _ ys [] = reverse ys:[]
-       go 0 ys xs = reverse ys:go n [] xs
-       go m ys (x:xs) = go (m-1) (x:ys) xs
diff --git a/Data/UUID/V5.hs b/Data/UUID/V5.hs
deleted file mode 100644
--- a/Data/UUID/V5.hs
+++ /dev/null
@@ -1,47 +0,0 @@
--- |
--- Module      : Data.UUID.V5
--- Copyright   : (c) 2008-2009 Antoine Latter
---
--- License     : BSD-style
---
--- Maintainer  : aslatter@gmail.com
--- Stability   : experimental
--- Portability : portable
---
---
--- This module implements Version 5 UUIDs as specified
--- in RFC 4122.
---
--- These UUIDs identify an object within a namespace,
--- and are deterministic.
---
--- The namespace is identified by a UUID.  Several sample
--- namespaces are enclosed.
-
-module Data.UUID.V5
-    (generateNamed
-    ,Shared.namespaceDNS
-    ,Shared.namespaceURL
-    ,Shared.namespaceOID
-    ,Shared.namespaceX500
-    ) where
-
-import Data.Word
-
-import Data.UUID.Internal
-import qualified Data.UUID.Named as Shared
-import qualified Data.Digest.SHA1 as SHA1
-
-
--- |Generate a 'UUID' within the specified namespace out of the given
--- object.
---
--- Uses a SHA1 hash. The UUID is built from first 128 bits of the hash of
--- the namespace UUID and the name (as a series of Word8).
-generateNamed :: UUID    -- ^Namespace
-              -> [Word8] -- ^Object
-              -> UUID
-generateNamed = Shared.generateNamed hash 5
- where hash bytes
-           = case SHA1.hash bytes of
-               SHA1.Word160 w1 w2 w3 w4 _w5 -> (w1, w2, w3, w4)
diff --git a/src/Data/UUID.hs b/src/Data/UUID.hs
new file mode 100644
--- /dev/null
+++ b/src/Data/UUID.hs
@@ -0,0 +1,52 @@
+{- |
+Module      : Data.UUID
+Copyright   : (c) 2008,2012 Antoine Latter
+
+License     : BSD-style
+
+Maintainer  : aslatter@gmail.com
+Stability   : experimental
+Portability : portable
+
+
+This library is useful for comparing, parsing and
+printing Universally Unique Identifiers.
+See <http://en.wikipedia.org/wiki/UUID> for the general idea.
+See <http://tools.ietf.org/html/rfc4122> for the specification.
+
+* Use 'Data.UUID.V4.nextRandom' to generate secure random UUIDs, and your
+favorite instance of 'System.Random.Random' for faster but insecure
+generation of UUIDs.
+
+* We have an implementation of generating a UUID from the hardware
+MAC address and current system time in "Data.UUID.V1".
+
+* For name-based generation of UUIDs using SHA-1 hashing see
+"Data.UUID.V5".
+-}
+module Data.UUID(UUID
+                ,toString
+                ,fromString
+                ,toText
+                ,fromText
+                ,toASCIIBytes
+                ,fromASCIIBytes
+                ,toLazyASCIIBytes
+                ,fromLazyASCIIBytes
+                ,toByteString
+                ,fromByteString
+                ,toWords
+                ,fromWords
+                ,toWords64
+                ,fromWords64
+                ,null
+                ,nil
+                ) where
+
+import Prelude () -- we need to hide Prelude.null
+import Data.UUID.Types
+
+-- We use explicit re-exports of everything from Data.UUID.Types in
+-- preference to just re-exporting the whole module. This is to avoid
+-- unforeseen transitive API breakage if the Data.UUID.Types module
+-- should change.
diff --git a/src/Data/UUID/Named.hs b/src/Data/UUID/Named.hs
new file mode 100644
--- /dev/null
+++ b/src/Data/UUID/Named.hs
@@ -0,0 +1,72 @@
+-- |
+-- Module      : Data.UUID.Named
+-- Copyright   : (c) 2008 Antoine Latter
+--
+-- License     : BSD-style
+--
+-- Maintainer  : aslatter@gmail.com
+-- Stability   : experimental
+-- Portability : portable
+--
+--
+-- This module implements Version 3/5 UUIDs as specified
+-- in RFC 4122.
+--
+-- These UUIDs identify an object within a namespace,
+-- and are deterministic.
+--
+-- The namespace is identified by a UUID.  Several sample
+-- namespaces are enclosed.
+
+module Data.UUID.Named
+    (generateNamed
+    ,namespaceDNS
+    ,namespaceURL
+    ,namespaceOID
+    ,namespaceX500
+    ) where
+
+import Data.UUID.Types.Internal
+
+import Control.Applicative ((<*>),(<$>))
+import Data.Binary.Get (runGet, getWord32be)
+import Data.Maybe
+import Data.Word (Word8)
+
+import qualified Data.ByteString as B
+import qualified Data.ByteString.Lazy as BL
+
+-- |Generate a 'UUID' within the specified namespace out of the given
+-- object.
+generateNamed :: (B.ByteString -> B.ByteString) -- ^Hash
+              -> Word8   -- ^Version
+              ->  UUID   -- ^Namespace
+              -> [Word8] -- ^Object
+              -> UUID
+generateNamed hash version namespace object =
+    let chunk = B.pack $ toList namespace ++ object
+        bytes = BL.fromChunks . (:[]) $ hash chunk
+        w = getWord32be
+        unpackBytes = runGet $
+         buildFromWords version <$> w <*> w <*> w <*> w
+    in unpackBytes bytes
+
+
+unsafeFromString :: String -> UUID
+unsafeFromString = fromJust . fromString
+
+-- |The namespace for DNS addresses
+namespaceDNS :: UUID
+namespaceDNS = unsafeFromString "6ba7b810-9dad-11d1-80b4-00c04fd430c8"
+
+-- |The namespace for URLs
+namespaceURL :: UUID
+namespaceURL = unsafeFromString "6ba7b811-9dad-11d1-80b4-00c04fd430c8"
+
+-- |The namespace for ISO OIDs
+namespaceOID :: UUID
+namespaceOID = unsafeFromString "6ba7b812-9dad-11d1-80b4-00c04fd430c8"
+
+-- |The namespace for X.500 DNs
+namespaceX500 :: UUID
+namespaceX500 = unsafeFromString "6ba7b814-9dad-11d1-80b4-00c04fd430c8"
diff --git a/src/Data/UUID/Util.hs b/src/Data/UUID/Util.hs
new file mode 100644
--- /dev/null
+++ b/src/Data/UUID/Util.hs
@@ -0,0 +1,53 @@
+{-# LANGUAGE TypeFamilies #-}
+module Data.UUID.Util (
+    UnpackedUUID(..)
+  , unpack, pack
+  , version
+  , extractMac
+  , extractTime
+  , setTime
+  ) where
+
+import Prelude hiding (null)
+import Data.Word
+import Data.Word.Util
+import Data.Bits
+import Data.UUID.Types.Internal
+import Network.Info
+import Data.Int (Int64)
+
+version :: UUID -> Int
+version uuid =
+    fromEnum ((time_hi_and_version unpacked `shiftR` 12) .&. 0xF)
+  where
+    unpacked = unpack uuid
+
+-- Note UUID time is in 10^-7 seconds.
+setTime :: (Integral a, Bits a) => UUID -> a -> Maybe UUID
+setTime uuid t =
+  if version uuid == 1
+  then Just $ pack $ (unpack uuid){time_low = new_low_bits, time_mid = new_mid_bits, time_hi_and_version = new_hi_and_version_bits}
+  else Nothing
+       where new_low_bits = fromIntegral $ t .&. 0xFFFFFFFF
+             new_mid_bits = fromIntegral $ (t `shiftR` 32) .&. 0xFFFF
+             new_hi_and_version_bits = fromIntegral $ 0x1000 .|. ((t `shiftR` 48) .&. 0x0FFF)
+
+extractTime :: UUID -> Maybe Int64
+extractTime uuid =
+  if version uuid == 1
+  then Just $ fromIntegral $ w32to64 (w16to32 (timeAndVersionToTime $ time_hi_and_version unpacked) $ time_mid unpacked) (time_low unpacked)
+  else Nothing
+  where
+    unpacked = unpack uuid
+
+timeAndVersionToTime :: Word16 -> Word16
+timeAndVersionToTime tv = tv .&. 0x0FFF
+
+extractMac :: UUID -> Maybe MAC
+extractMac uuid =
+  if version uuid == 1
+  then Just $
+       MAC (node_0 unpacked) (node_1 unpacked) (node_2 unpacked) (node_3 unpacked) (node_4 unpacked) (node_5 unpacked)
+  else Nothing
+  where
+    unpacked = unpack uuid
diff --git a/src/Data/UUID/V1.hs b/src/Data/UUID/V1.hs
new file mode 100644
--- /dev/null
+++ b/src/Data/UUID/V1.hs
@@ -0,0 +1,135 @@
+{-# OPTIONS_GHC -fno-cse #-}
+{-# LANGUAGE TypeFamilies #-}
+
+{- |
+Module      : Data.UUID.V1
+Copyright   : (c) 2008 Jason Dusek
+              (c) 2009 Mark Lentczner
+              (c) 2009-2010,2012 Antoine Latter
+
+License     : BSD-style
+
+Maintainer  : aslatter@gmail.com
+Stability   : experimental
+Portability : portable
+
+RFC 4122 Version 1 UUID state machine.
+
+The generated UUID is based on the hardware MAC
+address and the system clock.
+
+If we cannot lookup the MAC address we seed the
+generator with a pseudo-random number.
+-}
+
+module Data.UUID.V1(nextUUID)
+where
+
+
+import Data.Bits
+import Data.Maybe
+import Data.Time
+import Data.Word
+
+import Control.Applicative ((<$>),(<*>))
+import Control.Concurrent.MVar
+import System.IO.Unsafe
+
+import qualified System.Random as R
+
+import Network.Info
+
+import Data.UUID.Types.Internal.Builder
+import Data.UUID.Types.Internal
+
+-- | Returns a new UUID derived from the local hardware MAC
+-- address and the current system time.
+-- Is generated according to the Version 1 UUID specified in
+-- RFC 4122.
+--
+-- Returns 'Nothing' if you request UUIDs too quickly.
+nextUUID :: IO (Maybe UUID)
+nextUUID = do
+  res <- stepTime
+  case res of
+    Just (mac', c, t) -> return $ Just $ makeUUID t c mac'
+    _ -> return Nothing
+
+
+makeUUID :: Word64 -> Word16 -> MAC -> UUID
+makeUUID time clock mac' =
+    buildFromBytes 1 /-/ tLow /-/ tMid /-/ tHigh /-/ clock /-/ (MACSource mac')
+    where tLow = (fromIntegral time) :: Word32
+          tMid = (fromIntegral (time `shiftR` 32)) :: Word16
+          tHigh = (fromIntegral (time `shiftR` 48)) :: Word16
+
+newtype MACSource = MACSource MAC
+instance ByteSource MACSource where
+    z /-/ (MACSource (MAC a b c d e f)) = z a b c d e f
+type instance ByteSink MACSource g = Takes3Bytes (Takes3Bytes g)
+
+
+-- |Approximates the clock algorithm in RFC 4122, section 4.2
+-- Isn't system wide or thread safe, nor does it properly randomize
+-- the clock value on initialization.
+stepTime :: IO (Maybe (MAC, Word16, Word64))
+stepTime = do
+  h1 <- fmap hundredsOfNanosSinceGregorianReform getCurrentTime
+  modifyMVar state $ \s@(State mac' c0 h0) ->
+   if h1 > h0
+    then
+      return (State mac' c0 h1, Just (mac', c0, h1))
+    else
+      let
+        c1 = succ c0
+      in if c1 <= 0x3fff -- when clock is initially randomized,
+                      -- then this test will need to change
+         then
+          return (State mac' c1 h1, Just (mac', c1, h1))
+        else
+          return (s, Nothing)
+
+
+{-# NOINLINE state #-}
+state :: MVar State
+state = unsafePerformIO $ do
+  h0 <- fmap hundredsOfNanosSinceGregorianReform getCurrentTime
+  mac' <- getMac
+  newMVar $ State mac' 0 h0 -- the 0 should be a random number
+
+-- SysMAC.mac can fail on some machines.
+-- In those cases we fake it with a random
+-- 6 bytes seed.
+getMac :: IO MAC
+getMac =
+    getNetworkInterfaces >>=
+    return . listToMaybe . filter (minBound /=) . map mac >>=
+    \macM -> case macM of
+      Just m -> return m
+      Nothing -> randomMac
+
+randomMac :: IO MAC
+randomMac =
+    -- I'm too lazy to thread through
+    -- the random state ...
+    MAC
+     <$> (R.randomIO >>= return . (1 .|.)) -- We must set the multicast bit to True. See section 4.5 of the RFC.
+     <*> R.randomIO
+     <*> R.randomIO
+     <*> R.randomIO
+     <*> R.randomIO
+     <*> R.randomIO
+
+data State = State
+    {-# UNPACK #-} !MAC
+    {-# UNPACK #-} !Word16
+    {-# UNPACK #-} !Word64
+ deriving (Show)
+
+
+
+hundredsOfNanosSinceGregorianReform :: UTCTime -> Word64
+hundredsOfNanosSinceGregorianReform t = floor $ 10000000 * dt
+ where
+  gregorianReform = UTCTime (fromGregorian 1582 10 15) 0
+  dt = t `diffUTCTime` gregorianReform
diff --git a/src/Data/UUID/V3.hs b/src/Data/UUID/V3.hs
new file mode 100644
--- /dev/null
+++ b/src/Data/UUID/V3.hs
@@ -0,0 +1,49 @@
+{- |
+Module      : Data.UUID.V3
+Copyright   : (c) 2010,2012 Antoine Latter
+
+License     : BSD-style
+
+Maintainer  : aslatter@gmail.com
+Stability   : experimental
+Portability : portable
+
+NOTE\: This module uses MD5 hashing. Unless you know
+you need to use this module, you should probably be
+using "Data.UUID.V5", which offers the same sort of
+functionality as this module except implemented with
+SHA-1 hashing.
+
+This module implements Version 3 UUIDs as specified
+in RFC 4122.
+
+These UUIDs identify an object within a namespace,
+and are deterministic.
+
+The namespace is identified by a UUID.  Several sample
+namespaces are enclosed.
+-}
+module Data.UUID.V3
+    (generateNamed
+    ,Shared.namespaceDNS
+    ,Shared.namespaceURL
+    ,Shared.namespaceOID
+    ,Shared.namespaceX500
+    ) where
+
+import Data.Word
+
+import Data.UUID.Types.Internal
+import qualified Data.UUID.Named as Shared
+import qualified Crypto.Hash.MD5 as MD5
+
+
+-- |Generate a 'UUID' within the specified namespace out of the given
+-- object.
+--
+-- Uses an MD5 hash. The UUID is built from first 128 bits of the hash of
+-- the namespace UUID and the name (as a series of Word8).
+generateNamed :: UUID    -- ^Namespace
+              -> [Word8] -- ^Object
+              -> UUID
+generateNamed = Shared.generateNamed MD5.hash 3
diff --git a/src/Data/UUID/V4.hs b/src/Data/UUID/V4.hs
new file mode 100644
--- /dev/null
+++ b/src/Data/UUID/V4.hs
@@ -0,0 +1,33 @@
+{- |
+   Module      : Data.UUID.V4
+   Copyright   : (c) 2012-2016 Antoine Latter
+
+   License     : BSD-style
+
+   Maintainer  : aslatter@gmail.com
+   Stability   : experimental
+   Portability : portable
+
+   This module implements Version 4 UUIDs as specified
+   in RFC 4122.
+
+   These UUIDs are generated from a pseudo-random generator.
+   We use the 'getEntropy' method from the <https://hackage.haskell.org/package/entropy entropy> package,
+   which should provide cryptographically secure random data.
+-}
+module Data.UUID.V4 (nextRandom) where
+
+import Data.UUID
+import Data.UUID.Types.Internal ( buildFromBytes )
+
+import System.Entropy ( getEntropy )
+import Data.ByteString ( unpack )
+
+-- | Generate a crytographically secure, random UUID.
+--
+-- @since 1.2.6
+nextRandom :: IO UUID
+nextRandom = do
+  [b0, b1, b2, b3, b4, b5, b6, b7, b8, b9, ba, bb, bc, bd, be, bf]
+    <- unpack `fmap` getEntropy 16
+  return $ buildFromBytes 4 b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 ba bb bc bd be bf
diff --git a/src/Data/UUID/V5.hs b/src/Data/UUID/V5.hs
new file mode 100644
--- /dev/null
+++ b/src/Data/UUID/V5.hs
@@ -0,0 +1,44 @@
+-- |
+-- Module      : Data.UUID.V5
+-- Copyright   : (c) 2008-2009 Antoine Latter
+--
+-- License     : BSD-style
+--
+-- Maintainer  : aslatter@gmail.com
+-- Stability   : experimental
+-- Portability : portable
+--
+--
+-- This module implements Version 5 UUIDs as specified
+-- in RFC 4122.
+--
+-- These UUIDs identify an object within a namespace,
+-- and are deterministic.
+--
+-- The namespace is identified by a UUID.  Several sample
+-- namespaces are enclosed.
+
+module Data.UUID.V5
+    (generateNamed
+    ,Shared.namespaceDNS
+    ,Shared.namespaceURL
+    ,Shared.namespaceOID
+    ,Shared.namespaceX500
+    ) where
+
+import Data.Word
+
+import Data.UUID.Types.Internal
+import qualified Data.UUID.Named as Shared
+import qualified Crypto.Hash.SHA1 as SHA1
+
+
+-- |Generate a 'UUID' within the specified namespace out of the given
+-- object.
+--
+-- Uses a SHA1 hash. The UUID is built from first 128 bits of the hash of
+-- the namespace UUID and the name (as a series of Word8).
+generateNamed :: UUID    -- ^Namespace
+              -> [Word8] -- ^Object
+              -> UUID
+generateNamed = Shared.generateNamed SHA1.hash 5
diff --git a/src/Data/Word/Util.hs b/src/Data/Word/Util.hs
new file mode 100644
--- /dev/null
+++ b/src/Data/Word/Util.hs
@@ -0,0 +1,20 @@
+
+-- | Internal utilites
+module Data.Word.Util where
+
+import Data.Bits
+import Data.Word
+
+w16to32 :: Word16 -> Word16 -> Word32
+w16to32 w0s w1s =
+    (w0 `shiftL` 16) .|. w1
+  where
+    w0 = fromIntegral w0s
+    w1 = fromIntegral w1s
+
+w32to64 :: Word32 -> Word32 -> Word64
+w32to64 w0s w1s =
+    (w0 `shiftL` 32) .|. w1
+  where
+    w0 = fromIntegral w0s
+    w1 = fromIntegral w1s
diff --git a/tests/BenchUUID.hs b/tests/BenchUUID.hs
deleted file mode 100644
--- a/tests/BenchUUID.hs
+++ /dev/null
@@ -1,133 +0,0 @@
-import Control.Parallel.Strategies
-import Criterion.Main
-import Data.Char (ord)
-import Data.IORef
-import Data.Maybe (fromJust)
-import Data.Word
-import qualified Data.Set as Set
-import qualified Data.ByteString.Lazy as BL
-import qualified Data.ByteString.Lazy.Internal as BL
-import qualified Data.UUID.Internal as U
-import qualified Data.UUID.V1 as U
-import qualified Data.UUID.V3 as U3
-import qualified Data.UUID.V5 as U5
-import System.Random
-import System.Random.Mersenne.Pure64
-
-instance NFData BL.ByteString where
-    rnf BL.Empty        = ()
-    rnf (BL.Chunk _ ts) = rnf ts
-
-instance NFData U.UUID where
-
-
-main :: IO ()
-main = do
-        u1 <- randomIO
-        let s1 = U.toString u1
-            b1 = U.toByteString u1
-            n1 = (map (fromIntegral . ord) "http://www.haskell.org/") :: [Word8]
-            nil2 = fromJust $
-                        U.fromString "00000000-0000-0000-0000-000000000000"
-            u2a = fromJust $ U.fromString "169a5a43-c051-4a16-98f4-08447ddd5dc0"
-            u2b = fromJust $ U.fromByteString $
-                        BL.pack [0x16, 0x9a, 0x5a, 0x43, 0xc0, 0x51, 0x4a, 0x16,
-                                 0x98, 0xf4, 0x08, 0x44, 0x7d, 0xdd, 0x5d, 0xc0]
-            u3  = fromJust $ U.fromString "dea6f619-1038-438b-b4af-f1cdec1e6e23"
-
-        -- setup for random generation
-        randomState <- newPureMT >>= newIORef
-        let randomUUID = do
-              state <- readIORef randomState
-              let (uuid, state') = random state
-              writeIORef randomState state'
-              return uuid
-
-        defaultMain [
-            bgroup "testing" [
-                bench "null non-nil"   $ whnf U.null u1,
-                bench "null nil"       $ whnf U.null U.nil,
-                bench "null nil2"      $ whnf U.null nil2,
-                bench "eq same"        $ whnf (==u2a) u2b,
-                bench "eq differ"      $ whnf (==u2a) u3
-                ],
-            bgroup "conversion" [
-                bench "toString"       $ nf U.toString u1,
-                bench "fromString"     $ nf U.fromString s1,
-                bench "toByteString"   $ nf U.toByteString u1,
-                bench "fromByteString" $ nf U.fromByteString b1
-                ],
-            bgroup "generation" [
-                bench "V1" $ nfIO U.nextUUID,
-                bench "V4" $ nfIO (randomUUID :: IO U.UUID),
-                bench "V3" $ nf   (U3.generateNamed U3.namespaceURL) n1,
-                bench "V5" $ nf   (U5.generateNamed U5.namespaceURL) n1
-                ],
-            bench "set making" $ nf Set.fromList uuids
-            ]
-
--- 50 uuids, so tests can be repeatable
-uuids :: [U.UUID]
-uuids 
-    = map (fromJust . U.fromString)
-        [
-         "35d42593-1fca-4465-b588-a2e78cb996ba",
-         "1e97e407-eca7-4c5d-a947-6fbe9dc168b6",
-         "a41fd7ce-a053-4c0a-a742-77c95b85da2a",
-         "f7e3913a-0fd7-4355-a92f-d73f9b046efa",
-         "8961a35d-55c2-42f3-8680-08fce3986647",
-         "96246c58-d0b4-4e56-a543-356bd59686a9",
-         "72c46194-648c-4b1e-a9fb-2eba060ab43b",
-         "0fc252d4-a37b-4eca-9309-e3d2a59a3a22",
-         "a8aceb5a-6a8e-43f3-85bb-9653a3c1ebcd",
-         "b23d1118-6bc8-4add-9d56-99634d78949f",
-         "5f8c7896-9c4f-4d7e-a4d2-961bda298012",
-         "219a4137-7bc5-42b1-ac95-490948a978e1",
-         "5af5024f-fbe9-45ab-991d-49b655994437",
-         "569dfb33-185d-4a3c-99c4-bc2b83250a7c",
-         "43a58442-aa51-4a5d-8e00-b8a83b5fc5b0",
-         "2865ced1-b54d-4725-8f01-b408f4617424",
-         "b8cfaff0-4dee-4f32-af2f-0469b3e535fc",
-         "63f45bc0-f303-4f1a-b0d6-76f876be626d",
-         "d171eaf3-f20d-45d6-9268-0cc22dfbe887",
-         "7c28f457-ad27-494a-8642-6e47e7f3efb8",
-         "f8de9193-66ff-49e8-9826-fc50858d7855",
-         "2af85f28-cace-4740-b8bb-2b5860f5fdb3",
-         "b12a7a22-edb3-4694-b8f4-0532eaad6112",
-         "5e052a08-8e49-4668-bbe7-77cdbc4679a3",
-         "42d5a68d-3f08-4e39-9b8c-71cc17c538ed",
-         "ba2b1487-b3a4-4a19-98cc-59530f36613f",
-         "e4a5c569-b8ac-4851-8ad2-fbdb89986be2",
-         "35b4a1b6-b5ca-4646-803b-c337ee730d9a",
-         "f0df1206-05d9-49d6-a726-d49fb253e645",
-         "9656a0f0-89b2-4cec-bb1c-fdf5633e1cd7",
-         "d13382f5-04a1-422d-94d6-e47219425816",
-         "b8d0c762-4c6b-4bd0-ad0b-f68988a87166",
-         "06360e85-f18a-44f6-aa72-45f1e60b6b77",
-         "347491ca-62b3-48e8-ac94-6ffebe1318ed",
-         "014339d0-7b2d-4dda-914b-14ee5cb4391b",
-         "dc57931b-4744-41be-b3c4-e24dbeeb606a",
-         "2c9fdcf0-e1d6-4a2d-951d-4766b99032cb",
-         "b6bde422-eea8-4231-bf1c-ee0e56699511",
-         "921073c5-f7c1-4583-ac03-aeb7aef8662b",
-         "eff6a517-aeb1-453e-9810-1b4b324c5a1e",
-         "eadaae8c-cbf8-4e0b-ab80-e34284b07dad",
-         "4d307c36-70d9-453f-8455-ec7e2ba405ed",
-         "53ddef9a-2413-4f7f-8363-cff56ee17c6c",
-         "4dd4c27a-b300-4a00-ab87-eef505275492",
-         "4a5d7001-f0c1-4e2f-8362-8833bda2114b",
-         "0c46f438-9365-406a-b04e-34436806ec25",
-         "b35469cf-05f8-40ff-a38b-117604347957",
-         "f1c54df0-5f59-4891-b3c6-82bac0d814ca",
-         "8091837c-6456-42c3-a686-f4731a41d4f9",
-         "2a0e2efb-a11c-4a44-81ee-3efc37379b48"
-        ]
-
-#if !(MIN_VERSION_criterion(0,4,0))
-nf f arg = B ( rnf . f) arg
-whnf f arg = B f arg
-#endif
-
-#if !(MIN_VERSION_criterion(0,4,1))
-nfIO act = rnf `fmap` act
-#endif
diff --git a/tests/TestUUID.hs b/tests/TestUUID.hs
--- a/tests/TestUUID.hs
+++ b/tests/TestUUID.hs
@@ -1,6 +1,8 @@
+{-# LANGUAGE ViewPatterns #-}
+
 import Control.Monad (replicateM)
 import Data.Bits
-import qualified Data.ByteString.Lazy as B
+import qualified Data.ByteString.Lazy as BL
 import Data.Char (ord)
 import Data.List (nub, (\\))
 import Data.Maybe
@@ -9,154 +11,102 @@
 import qualified Data.UUID.V1 as U
 import qualified Data.UUID.V3 as U3
 import qualified Data.UUID.V5 as U5
-import Test.HUnit
-import Test.QuickCheck
-import System.IO
-import System.Random
 
+import Test.QuickCheck ( Arbitrary(arbitrary), choose )
+import Test.Tasty ( TestTree, testGroup, defaultMain )
+import Test.Tasty.HUnit
+      ( assertBool, (@?=), testCase )
+import Test.Tasty.QuickCheck ( testProperty )
 
+type Test = TestTree
+
 isValidVersion :: Int -> U.UUID -> Bool
 isValidVersion v u = lenOK && variantOK && versionOK
     where bs = U.toByteString u
-          lenOK = B.length bs == 16
-          variantOK = (B.index bs 8) .&. 0xc0 == 0x80
-          versionOK = (B.index bs 6) .&. 0xf0 == fromIntegral (v `shiftL` 4)
+          lenOK = BL.length bs == 16
+          variantOK = (BL.index bs 8) .&. 0xc0 == 0x80
+          versionOK = (BL.index bs 6) .&. 0xf0 == fromIntegral (v `shiftL` 4)
 
 
 instance Arbitrary U.UUID where
-    arbitrary = (fst . random) `fmap` rand
-    coarbitrary = undefined
-
-instance Arbitrary Word8 where
-    arbitrary = (fromIntegral . fst . randomR (0,255::Int)) `fmap` rand
-    coarbitrary = undefined
+    -- the UUID random instance ignores bounds
+    arbitrary = choose (U.nil, U.nil)
 
 
 test_null :: Test
-test_null = TestList [
-    "nil is null"              ~: assertBool "" (U.null U.nil),
-    "namespaceDNS is not null" ~: assertBool "" (not $ U.null U3.namespaceDNS)
-    ]
-
-test_nil :: Test
-test_nil = TestList [
-    "nil string" ~: U.toString U.nil @?= "00000000-0000-0000-0000-000000000000",
-    "nil bytes"  ~: U.toByteString U.nil @?= B.pack (replicate 16 0)
-    ]
-
-test_conv :: Test
-test_conv = TestList [
-    "conv bytes to string" ~:
-        maybe "" (U.toString) (U.fromByteString b16) @?= s16,
-    "conv string to bytes" ~:
-        maybe B.empty (U.toByteString) (U.fromString s16) @?= b16
-    ]
-    where b16 = B.pack [1..16]
-          s16 = "01020304-0506-0708-090a-0b0c0d0e0f10"
+test_null =
+  testCase "namespaceDNS is not null" $
+  assertBool "" (not $ U.null U3.namespaceDNS)
 
 test_v1 :: [Maybe U.UUID] -> Test
-test_v1 v1s = TestList [
-    "V1 unique" ~: nub (v1s \\ nub v1s) @?= [],
-    "V1 not null" ~: TestList $ map (testUUID (not . U.null))  v1s,
-    "V1 valid"    ~: TestList $ map (testUUID (isValidVersion 1)) v1s
+test_v1 v1s = testGroup "version 1" [
+    testCase  "V1 unique"   $ nub (v1s \\ nub v1s) @?= [],
+    testGroup "V1 not null" $ map (testUUID (not . U.null))  v1s,
+    testGroup "V1 valid"    $ map (testUUID (isValidVersion 1)) v1s
     ]
     where testUUID :: (U.UUID -> Bool) -> Maybe U.UUID -> Test
-          testUUID p u = maybe False p u ~? show u
+          testUUID p u =
+            testCase (show u) $
+            assertBool "" $ maybe False p u
 
 test_v3 :: Test
-test_v3 = TestList [
-    "V3 computation" ~:
+test_v3 =
+    testCase "V3 computation" $
           U3.generateNamed U3.namespaceDNS name @?= uV3
-    ]
-    where name = map (fromIntegral . ord) "www.widgets.com" :: [Word8]
-          uV3 = fromJust $ U.fromString "3d813cbb-47fb-32ba-91df-831e1593ac29"
 
+  where name = map (fromIntegral . ord) "www.widgets.com" :: [Word8]
+        uV3 = fromJust $ U.fromString "3d813cbb-47fb-32ba-91df-831e1593ac29"
+
 test_v5 :: Test
-test_v5 = TestList [
-    "V5 computation" ~:
+test_v5 =
+    testCase "V5 computation" $
           U5.generateNamed U5.namespaceDNS name @?= uV5
-    ]
+
     where name = map (fromIntegral . ord) "www.widgets.com" :: [Word8]
           uV5 = fromJust $ U.fromString "21f7f8de-8051-5b89-8680-0195ef798b6a"
 
-prop_stringRoundTrip :: Property
-prop_stringRoundTrip = label "String round trip" stringRoundTrip
-    where stringRoundTrip :: U.UUID -> Bool
-          stringRoundTrip u = maybe False (== u) $ U.fromString (U.toString u)
 
-prop_byteStringRoundTrip :: Property
-prop_byteStringRoundTrip = label "ByteString round trip" byteStringRoundTrip
-    where byteStringRoundTrip :: U.UUID -> Bool
-          byteStringRoundTrip u = maybe False (== u)
-                                    $ U.fromByteString (U.toByteString u)
-
-prop_stringLength :: Property
-prop_stringLength = label "String length" stringLength
-    where stringLength :: U.UUID -> Bool
-          stringLength u = length (U.toString u) == 36
-
-prop_byteStringLength :: Property
-prop_byteStringLength = label "ByteString length" byteStringLength
-    where byteStringLength :: U.UUID -> Bool
-          byteStringLength u = B.length (U.toByteString u) == 16
-
-prop_randomsDiffer :: Property
-prop_randomsDiffer = label "Randoms differ" randomsDiffer
-    where randomsDiffer :: (U.UUID, U.UUID) -> Bool
-          randomsDiffer (u1, u2) = u1 /= u2
-
-prop_randomNotNull :: Property
-prop_randomNotNull = label "Random not null" randomNotNull
-    where randomNotNull :: U.UUID -> Bool
-          randomNotNull = not. U.null
-
-prop_randomsValid :: Property
-prop_randomsValid = label "Random valid" randomsValid
+prop_randomsValid :: Test
+prop_randomsValid = testProperty "Random valid" randomsValid
     where randomsValid :: U.UUID -> Bool
           randomsValid = isValidVersion 4
 
-prop_v3NotNull :: Property
-prop_v3NotNull = label "V3 not null" v3NotNull
+prop_v3NotNull :: Test
+prop_v3NotNull = testProperty "V3 not null" v3NotNull
     where v3NotNull :: [Word8] -> Bool
           v3NotNull = not . U.null . U3.generateNamed U3.namespaceDNS
 
-prop_v3Valid :: Property
-prop_v3Valid = label "V3 valid" v3Valid
+prop_v3Valid :: Test
+prop_v3Valid = testProperty "V3 valid" v3Valid
     where v3Valid :: [Word8] -> Bool
           v3Valid = isValidVersion 3 . U3.generateNamed U3.namespaceDNS
 
-prop_v5NotNull :: Property
-prop_v5NotNull = label "V5 not null" v5NotNull
+prop_v5NotNull :: Test
+prop_v5NotNull = testProperty "V5 not null" v5NotNull
     where v5NotNull :: [Word8] -> Bool
           v5NotNull = not . U.null . U5.generateNamed U5.namespaceDNS
 
-prop_v5Valid :: Property
-prop_v5Valid = label "V5 valid" v5Valid
+prop_v5Valid :: Test
+prop_v5Valid = testProperty "V5 valid" v5Valid
     where v5Valid :: [Word8] -> Bool
           v5Valid = isValidVersion 5 . U5.generateNamed U5.namespaceDNS
 
-
 main :: IO ()
 main = do
     v1s <- replicateM 100 U.nextUUID
-    runTestText (putTextToHandle stderr False) (TestList [
+    defaultMain $
+     testGroup "tests" $
+     concat $
+     [ [
         test_null,
-        test_nil,
-        test_conv,
         test_v1 v1s,
         test_v3,
         test_v5
-        ])
-    mapM_ quickCheck $ [
-        prop_stringRoundTrip,
-        prop_byteStringRoundTrip,
-        prop_stringLength,
-        prop_byteStringLength,
-        prop_randomsDiffer,
-        prop_randomNotNull,
-        prop_randomsValid,
-        prop_v3NotNull,
-        prop_v3Valid,
-        prop_v5NotNull,
-        prop_v5Valid
         ]
+     , [ prop_randomsValid,
+         prop_v3NotNull,
+         prop_v3Valid,
+         prop_v5NotNull,
+         prop_v5Valid
+         ]
+     ]
diff --git a/uuid.cabal b/uuid.cabal
--- a/uuid.cabal
+++ b/uuid.cabal
@@ -1,79 +1,95 @@
-Name: uuid
-Version: 1.2.2
-Copyright: (c) 2008-2011 Antoine Latter
-Author: Antoine Latter
-Maintainer: aslatter@gmail.com
-License: BSD3
-License-file: LICENSE
-
-Category: Data
-Build-Type: Simple
-Cabal-Version: >= 1.6
-
-Description:
- This library is useful for creating, comparing, parsing and
- printing Universally Unique Identifiers.
- See <http://en.wikipedia.org/wiki/UUID> for the general idea. 
-
-Synopsis: For creating, comparing, parsing and printing Universally Unique Identifiers
+cabal-version:      1.12
+name:               uuid
+version:            1.3.16.1
+copyright:          (c) 2008-2014 Antoine Latter
+author:             Antoine Latter
+maintainer:         Oleg Grenrus <oleg.grenrus@iki.fi>
+license:            BSD3
+license-file:       LICENSE
+category:           Data
+build-type:         Simple
+tested-with:
+  GHC ==8.6.5
+   || ==8.8.4
+   || ==8.10.7
+   || ==9.0.2
+   || ==9.2.8
+   || ==9.4.8
+   || ==9.6.6
+   || ==9.8.4
+   || ==9.10.1
+   || ==9.12.4
+   || ==9.14.1
 
-Homepage: http://projects.haskell.org/uuid/
-Bug-Reports: mailto:aslatter@gmail.com
+synopsis:
+  For creating, comparing, parsing and printing Universally Unique Identifiers
 
-Extra-Source-Files:
-     CHANGES
-     CONTRIBUTORS
+description:
+  This library is useful for creating, comparing, parsing and
+  printing Universally Unique Identifiers.
+  .
+  See <http://en.wikipedia.org/wiki/UUID> for the general idea.
 
-Flag test
-  Description: Build unit test and benchmark programs.
-  Default:     False
+homepage:           https://github.com/haskell-hvr/uuid
+bug-reports:        https://github.com/haskell-hvr/uuid/issues
+extra-source-files: CHANGES.md
 
-Library
- Build-Depends: random, binary, bytestring, Crypto, maccatcher,
-                time, base >=3, base < 5
+source-repository head
+  type:     git
+  location: https://github.com/haskell-hvr/uuid.git
+  subdir:   uuid
 
- Exposed-Modules:
-   Data.UUID
-   Data.UUID.V1
-   Data.UUID.V3
-   Data.UUID.V5
+library
+  build-depends:
+      base             >=4.12     && <5
+    , binary           >=0.8.6.0  && <0.9
+    , bytestring       >=0.10.8.2 && <0.13
+    , cryptohash-md5   >=0.11.100 && <0.12
+    , cryptohash-sha1  >=0.11.100 && <0.12
+    , entropy          >=0.3.7    && <0.5
+    , network-info     >=0.2      && <0.3
+    , random           >=1.2.1.2  && <1.4
+    , time             >=1.4      && <1.16
 
- Other-Modules:
-   Data.UUID.Builder
-   Data.UUID.Internal
-   Data.UUID.Named
+  -- strict dependency on uuid-types,
+  -- as we re-rexport datatype, thus leak instances etc.
+  build-depends:      uuid-types >=1.0.6 && <1.0.7
+  exposed-modules:
+    Data.UUID
+    Data.UUID.Util
+    Data.UUID.V1
+    Data.UUID.V3
+    Data.UUID.V4
+    Data.UUID.V5
 
- Extensions: DeriveDataTypeable
- Ghc-Prof-Options:   -auto-all -caf-all
- Ghc-Shared-Options:
- Ghc-Options:        -Wall
+  other-modules:
+    Data.UUID.Named
+    Data.Word.Util
 
-Executable benchuuid
- Main-Is: BenchUUID.hs
- HS-Source-Dirs: tests .
- Extensions: DeriveDataTypeable, CPP
- If flag(test)
-  Buildable: True
-  Build-Depends: random, binary, bytestring, Crypto, maccatcher,
-                 time, base >=3, base < 5, containers,
-                 criterion >= 0.3 && < 0.5, parallel >= 2.1 && < 2.3,
-                 mersenne-random-pure64 >= 0.2 && < 0.3
- Else
-  Buildable: False
+  default-language:   Haskell2010
+  default-extensions: DeriveDataTypeable
+  other-extensions:   TypeFamilies
+  ghc-options:        -Wall
+  hs-source-dirs:     src
 
-Executable testuuid
- Main-Is: TestUUID.hs
- HS-Source-Dirs: tests .
- Extensions: DeriveDataTypeable
- Ghc-Prof-Options:   -auto-all -caf-all
- Ghc-Shared-Options:
- Ghc-Options:        -Wall -fno-warn-orphans
+test-suite test-uuid
+  type:               exitcode-stdio-1.0
+  main-is:            TestUUID.hs
+  hs-source-dirs:     tests
+  default-language:   Haskell2010
+  default-extensions: DeriveDataTypeable
+  other-extensions:   ViewPatterns
+  ghc-options:        -Wall -fno-warn-orphans
 
- If flag(test)
-  Buildable: True
-  Build-Depends: random, binary, bytestring, Crypto, maccatcher,
-                 time, base >=3, base < 5,
-                 HUnit >=1.2 && < 1.3, QuickCheck >=1.2 && < 1.3
- Else
-  Buildable: False
+  -- inherited constraints
+  build-depends:
+      base
+    , bytestring
+    , uuid
 
+  -- deps w/o inherited constraints
+  build-depends:
+      QuickCheck        >=2.14.2  && <2.16
+    , tasty             >=1.4.0.1 && <1.6
+    , tasty-hunit       >=0.10    && <0.11
+    , tasty-quickcheck  >=0.10    && <0.12
