diff --git a/Data/Containers/Monad.hs b/Data/Containers/Monad.hs
deleted file mode 100644
--- a/Data/Containers/Monad.hs
+++ /dev/null
@@ -1,12 +0,0 @@
-module Data.Containers.Monad where
-
-import Definitive.Base
-import Data.Containers
-
-instance (Monoid k,Ord k) => Unit (Map k) where
-  pure a = singleton zero a
-instance (Monoid k,Ord k) => Applicative (Map k)
-instance (Monoid k,Ord k) => Monad (Map k) where
-  join m = foldMap fun (m^.keyed)
-    where fun (k,m') = m' & ascList %~ \l -> [(k+k',a) | (k',a) <- l]
-
diff --git a/definitive-base.cabal b/definitive-base.cabal
--- a/definitive-base.cabal
+++ b/definitive-base.cabal
@@ -2,50 +2,49 @@
 name:          definitive-base
 category:      Prelude
 synopsis:      The base modules of the Definitive framework.
-description:     The Definitive framework is an attempt at harnessing the declarative
-  nature of Haskell to provide a solid and simple base for writing 
-  real-world programs, as well as complex algorithms.
-  
-  This package contains the base modules of the framework, and provides
-  only the most basic functionality, ranging from basic algebraic
-  structures, such as monoids and rings, to functors, applicative functors,
-  monads and transformers.
-  
-  Lenses are used heavily in all the framework's abstractions, replacing
-  more traditional functions ('WriterT' and 'runWriterT' are implemented
-  in the same isomorphism 'writerT', for example). When used wisely,
-  lenses can greatly improve clarity in both code and thought, so I
-  tried to provide for them in the most ubiquitous way possible,
-  defining them as soon as possible. Isomorphisms in particular are
-  surprisingly useful in many instances, from converting between types
-  to acting on a value's representation as if it were the value itself.
-  
-  Packages using the Definitive framework should be compiled with the 
-  RebindableSyntax flag and include the Definitive module, which exports
-  the same interface as the Prelude, except for some extras.
-  
-  Here is a list of design differences between the standard Prelude
-  and the Definitive framework :
-  
-    - The '+', '-', 'negate', and '*' are now part of the Semigroup,
-      Disjonctive, Negative, Semiring classes instead of Num (default
-      instances are defined to reimplement the Prelude, making it easy
-      to adjust your code for compatibility) 
-    
-    - The mapM, traverseM, liftM, and such functions have been hidden,
-      since they only reimplement the traverse, map, and other simpler
-      functions.
-  
-    - Lenses are used whenever possible instead of more usual functions.
-      You are encouraged to read the interface for the Algebra.Lens
-      module, which contains everything you will need to be able to use
-      lenses to their full potential (except maybe a good explanation).
-  
+description:   The Definitive framework is an attempt at harnessing the declarative
+               nature of Haskell to provide a solid and simple base for writing 
+               real-world programs, as well as complex algorithms.
+               .
+               This package contains the base modules of the framework, and provides
+               only the most basic functionality, ranging from basic algebraic
+               structures, such as monoids and rings, to functors, applicative functors,
+               monads and transformers.
+               .
+               Lenses are used heavily in all the framework's abstractions, replacing
+               more traditional functions ('WriterT' and 'runWriterT' are implemented
+               in the same isomorphism 'writerT', for example). When used wisely,
+               lenses can greatly improve clarity in both code and thought, so I
+               tried to provide for them in the most ubiquitous way possible,
+               defining them as soon as possible. Isomorphisms in particular are
+               surprisingly useful in many instances, from converting between types
+               to acting on a value's representation as if it were the value itself.
+               .
+               Packages using the Definitive framework should be compiled with the 
+               RebindableSyntax flag and include the Definitive module, which exports
+               the same interface as the Prelude, except for some extras.
+               
+               Here is a list of design differences between the standard Prelude
+               and the Definitive framework :
+               .
+               * The '+', '-', 'negate', and '*' are now part of the Semigroup,
+                 Disjonctive, Negative, Semiring classes instead of Num (default
+                 instances are defined to reimplement the Prelude, making it easy
+                 to adjust your code for compatibility) 
+               .
+               * The mapM, traverseM, liftM, and such functions have been hidden,
+                 since they only reimplement the traverse, map, and other simpler
+                 functions.
+               .
+               * Lenses are used whenever possible instead of more usual functions.
+                 You are encouraged to read the interface for the Algebra.Lens
+                 module, which contains everything you will need to be able to use
+                 lenses to their full potential (except maybe a good explanation).
 
 -- meta-information
 author:        Marc Coiffier
 maintainer:    marc.coiffier@gmail.com
-version:       1.2
+version:       1.2.1
 license:       OtherLicense
 license-file:  LICENSE
 
@@ -54,7 +53,7 @@
 cabal-version: >=1.10
 
 library
-  exposed-modules: Definitive Definitive.Base Algebra.Arrow Algebra.Core Algebra.Classes Algebra.Monad Algebra.Monad.Base Algebra.Applicative Algebra.Functor Algebra.Traversable Algebra.Foldable Algebra.Lens Algebra.Monad.RWS Algebra.Monad.State Algebra.Monad.Reader Algebra.Monad.Writer Algebra.Monad.Cont Algebra.Monad.Foldable Algebra.Monad.Error Data.Containers Data.Containers.Sequence Data.Probability Data.Containers.Monad
+  exposed-modules: Definitive Definitive.Base Algebra.Arrow Algebra.Core Algebra.Classes Algebra.Monad Algebra.Monad.Base Algebra.Applicative Algebra.Functor Algebra.Traversable Algebra.Foldable Algebra.Lens Algebra.Monad.RWS Algebra.Monad.State Algebra.Monad.Reader Algebra.Monad.Writer Algebra.Monad.Cont Algebra.Monad.Foldable Algebra.Monad.Error Data.Containers Data.Containers.Sequence Data.Probability
   build-depends: base (== 4.6.*), containers (== 0.5.*), deepseq (== 1.3.*), array (== 0.5.*), bytestring (== 0.10.*), vector (== 0.10.*), primitive (== 0.5.*)
   default-extensions: TypeSynonymInstances NoMonomorphismRestriction StandaloneDeriving GeneralizedNewtypeDeriving TypeOperators RebindableSyntax FlexibleInstances FlexibleContexts FunctionalDependencies TupleSections MultiParamTypeClasses Rank2Types
   ghc-options: -Wall -fno-warn-orphans -threaded
