haskell-chell: Fix for 7.10.1

pkgs/development/haskell-modules/configuration-ghc-7.9.x.nix

@@ -66,6 +66,14 @@ self: super: {
     # official upstream bugtracker but I've emailed this patch to the maintainer
     patches = [ ./patches/options-amp.patch ];
   });
+  chell = overrideCabal super.chell (drv: {
+    # edited cabal file simply makes a stricter base bound
+    editedCabalFile = null;
+
+    # See https://github.com/shlevy/chell/tree/AMP. There is no
+    # official upstream bugtracker but I've emailed this patch to the maintainer
+    patches = [ ./patches/chell-amp.patch ];
+  });
 
   # bos/attoparsec#92
   attoparsec = dontCheck super.attoparsec;

pkgs/development/haskell-modules/patches/chell-amp.patch

@@ -0,0 +1,20 @@
+commit 9ed27a3941b1d95833f0da403d90732c7ca7dad4
+Author: Shea Levy <shea@shealevy.com>
+Date:   Mon Jan 12 09:31:28 2015 -0500
+
+    Future-proof for the AMP
+    
+    See https://www.haskell.org/haskellwiki/Functor-Applicative-Monad_Proposal
+
+diff --git a/lib/Test/Chell.hs b/lib/Test/Chell.hs
+index 85d601a..2a72e2e 100644
+--- a/lib/Test/Chell.hs
++++ b/lib/Test/Chell.hs
+@@ -118,6 +118,7 @@ module Test.Chell
+ 	, testOptionTimeout
+ 	) where
+ 
++import           Prelude hiding (pure)
+ import qualified Control.Applicative
+ import qualified Control.Exception
+ import           Control.Exception (Exception)