diff --git a/pkgs/development/haskell-modules/brainfuck-fix-ghc710.patch b/pkgs/development/haskell-modules/brainfuck-fix-ghc710.patch
new file mode 100644
index 000000000000..ae3397fa573a
--- /dev/null
+++ b/pkgs/development/haskell-modules/brainfuck-fix-ghc710.patch
@@ -0,0 +1,19 @@
+diff -ru3 brainfuck-0.1-old/Language/Brainfuck.hs brainfuck-0.1/Language/Brainfuck.hs
+--- brainfuck-0.1-old/Language/Brainfuck.hs	2015-04-17 21:17:34.568721144 +0300
++++ brainfuck-0.1/Language/Brainfuck.hs	2015-04-17 21:19:17.065872395 +0300
+@@ -19,6 +19,8 @@
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA -}
+ 
++{-# LANGUAGE FlexibleContexts #-}
++
+ module Language.Brainfuck where
+ 
+ import Data.Array.IO
+@@ -287,4 +289,4 @@
+ 
+ halt = if debug
+          then putStrLn "Machine Halted.\n"
+-         else putStrLn "\n"
+\ No newline at end of file
++         else putStrLn "\n"
diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
index 13a1701bd38e..ead618705198 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
@@ -314,4 +314,8 @@ self: super: {
   # Fix evaluation in GHC >=7.8: https://github.com/lambdabot/lambdabot/issues/116
   lambdabot = appendPatch super.lambdabot ./lambdabot-fix-ghc78.patch;
 
+  # These packages don't have maintainers.
+  brainfuck = appendPatch super.brainfuck ./brainfuck-fix-ghc710.patch;
+  unlambda = appendPatch super.unlambda ./unlambda-fix-ghc710.patch;
+
 }
diff --git a/pkgs/development/haskell-modules/unlambda-fix-ghc710.patch b/pkgs/development/haskell-modules/unlambda-fix-ghc710.patch
new file mode 100644
index 000000000000..51c453557aa8
--- /dev/null
+++ b/pkgs/development/haskell-modules/unlambda-fix-ghc710.patch
@@ -0,0 +1,28 @@
+diff -ru3 unlambda-0.1.3-old/Language/Unlambda.hs unlambda-0.1.3/Language/Unlambda.hs
+--- unlambda-0.1.3-old/Language/Unlambda.hs	2015-04-17 21:16:32.415751612 +0300
++++ unlambda-0.1.3/Language/Unlambda.hs	2015-04-17 21:25:38.210123501 +0300
+@@ -29,6 +29,7 @@
+ import Prelude hiding(catch)
+ #endif
+ import Control.Exception (catch, IOException)
++import Control.Monad (liftM, ap)
+ 
+ ------------------------------------------------------------------------
+ -- Abstract syntax
+@@ -85,6 +86,16 @@
+ 
+ type Cont a = (Maybe Char, Int) -> a -> IO Exp
+ 
++instance Functor Eval where
++
++  fmap = liftM
++
++instance Applicative Eval where
++
++  pure = return
++
++  (<*>) = ap
++
+ instance Monad Eval where
+ 
+   (Eval cp1) >>= f = Eval $ \dat1 cont2 ->