diff --git a/midi.cabal b/midi.cabal
--- a/midi.cabal
+++ b/midi.cabal
@@ -1,5 +1,5 @@
 Name:             midi
-Version:          0.0.4
+Version:          0.0.5
 License:          GPL
 License-File:     LICENSE
 Author:           Henning Thielemann <haskell@henning-thielemann.de>
@@ -7,12 +7,6 @@
 Homepage:         http://darcs.haskell.org/midi/
 Category:         Sound
 Build-Type:       Simple
-Build-Depends:    event-list==0.0.5, non-negative==0.0.1, base>=1.0, mtl, QuickCheck
--- From the Monad Template Library we only need the State monad.
--- If your compiler does not support functional dependencies,
--- it would be easy to replace that by mapAccumL
--- or wait for a divided MTL package which is on the way:
--- http://darcs.haskell.org/packages/mtl-split/Control/Monad/Trans/State.hs
 Synopsis:         Handling of MIDI messages and files
 Description:
    MIDI is the Musical Instrument Digital Interface.
@@ -20,20 +14,35 @@
    reading and writing MIDI files.
    It contains no sending and receiving of MIDI messages. Cf. alsa-midi package.
    For music composition with MIDI output, see Haskore.
-GHC-Options:      -Wall
 Tested-With:      GHC==6.4.1
-Hs-Source-Dirs:   src
-Exposed-Modules:
-  Sound.MIDI.Event
-  Sound.MIDI.File
-  Sound.MIDI.File.Load
-  Sound.MIDI.File.Save
-  -- exports ByteString data type
-  Sound.MIDI.General
-  Sound.MIDI.IO
-Other-Modules:
-  Sound.MIDI.Bit
-  Sound.MIDI.Parser
-  Sound.MIDI.ParserState
-  Sound.MIDI.String
-  Sound.MIDI.Utility
+Cabal-Version:    >=1.2
+Build-Type:       Simple
+
+Flag splitBase
+  description: Choose the new smaller, split-up base package.
+
+Library
+  If flag(splitBase)
+    Build-Depends: base >= 2, event-list==0.0.6, non-negative==0.0.1, mtl, QuickCheck, random
+  Else
+    Build-Depends: base >= 1.0 && < 2, event-list==0.0.6, non-negative==0.0.1, mtl, QuickCheck
+    -- Instead of the full-blown Monad Template Library with multi-parameter type classes with functional dependencies
+    -- we also be happy with the less expensive
+    -- http://darcs.haskell.org/packages/mtl-split/Control/Monad/Trans/State.hs
+
+  GHC-Options:      -Wall
+  Hs-Source-Dirs:   src
+  Exposed-Modules:
+    Sound.MIDI.Event
+    Sound.MIDI.File
+    Sound.MIDI.File.Load
+    Sound.MIDI.File.Save
+    -- exports ByteString data type
+    Sound.MIDI.General
+    Sound.MIDI.IO
+  Other-Modules:
+    Sound.MIDI.Bit
+    Sound.MIDI.Parser
+    Sound.MIDI.ParserState
+    Sound.MIDI.String
+    Sound.MIDI.Utility