diff --git a/pkgs/development/libraries/haskell/pretty-show/1.6.1.nix b/pkgs/development/libraries/haskell/pretty-show/1.6.2.nix
similarity index 75%
rename from pkgs/development/libraries/haskell/pretty-show/1.6.1.nix
rename to pkgs/development/libraries/haskell/pretty-show/1.6.2.nix
index dc31b452a1bb..ea3b7ed27cbf 100644
--- a/pkgs/development/libraries/haskell/pretty-show/1.6.1.nix
+++ b/pkgs/development/libraries/haskell/pretty-show/1.6.2.nix
@@ -1,12 +1,13 @@
-{ cabal, filepath, haskellLexer }:
+{ cabal, filepath, happy, haskellLexer }:
 
 cabal.mkDerivation (self: {
   pname = "pretty-show";
-  version = "1.6.1";
-  sha256 = "17zdljvpf7ra9x3lny5kbjvmz3psn8y1k9cwbg97m017gh87gsh0";
+  version = "1.6.2";
+  sha256 = "0xhxyxymdjag2xczjrda5dkjc51m5k1nanpg9dmw0gr6wjaijbnp";
   isLibrary = true;
   isExecutable = true;
   buildDepends = [ filepath haskellLexer ];
+  buildTools = [ happy ];
   meta = {
     homepage = "http://wiki.github.com/yav/pretty-show";
     description = "Tools for working with derived `Show` instances and generic inspection of values";
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index ed7dddae7f6d..f7f2bd9d03b5 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1772,8 +1772,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
   ppm = callPackage ../development/libraries/haskell/ppm {};
 
   prettyShow_1_2 = callPackage ../development/libraries/haskell/pretty-show/1.2.nix {};
-  prettyShow_1_6_1 = callPackage ../development/libraries/haskell/pretty-show/1.6.1.nix {};
-  prettyShow = self.prettyShow_1_6_1;
+  prettyShow_1_6_2 = callPackage ../development/libraries/haskell/pretty-show/1.6.2.nix {};
+  prettyShow = self.prettyShow_1_6_2;
 
   punycode = callPackage ../development/libraries/haskell/punycode {};