diff --git a/Graphics/Rendering/Diagrams/Types.hs b/Graphics/Rendering/Diagrams/Types.hs
--- a/Graphics/Rendering/Diagrams/Types.hs
+++ b/Graphics/Rendering/Diagrams/Types.hs
@@ -52,7 +52,6 @@
 import qualified Graphics.Rendering.Cairo as C
 import Control.Monad.Reader
 import Data.Colour
-import Data.Colour.Names (black)
 import qualified Data.Colour.SRGB as RGB
 
 -- Diagrams ----------------------------------------------------------
diff --git a/diagrams.cabal b/diagrams.cabal
--- a/diagrams.cabal
+++ b/diagrams.cabal
@@ -1,5 +1,5 @@
 Name:                diagrams
-Version:             0.2.1.1
+Version:             0.2.1.2
 Stability:           experimental
 Description:         An embedded domain-specific language (EDSL) for 
                      creating simple diagrams, built on top of the Cairo
@@ -14,6 +14,7 @@
 Category:            Graphics
 Build-type:          Simple
 Cabal-version:       >= 1.2
+Tested-with:         GHC==6.12.1, GHC==6.10.4
 
 flag testing
   description: Testing mode
@@ -24,7 +25,7 @@
   if flag(testing)
     ghc-options: -Werror
   Build-Depends:     base >= 2 && < 5, mtl >= 1.0 && < 1.2,
-                     containers >= 0.2 && < 0.3,
+                     containers >= 0.2 && < 0.4,
                      cairo >= 0.9 && < 0.11, colour >= 2.2.1 && < 2.4
   Exposed-Modules:   Graphics.Rendering.Diagrams,
                      Graphics.Rendering.Diagrams.Types,