diff --git a/pkgs/development/libraries/haskell/pretty-show/1.2.nix b/pkgs/development/libraries/haskell/pretty-show/1.2.nix
new file mode 100644
index 00000000000..545816a57a0
--- /dev/null
+++ b/pkgs/development/libraries/haskell/pretty-show/1.2.nix
@@ -0,0 +1,16 @@
+{ cabal, haskellLexer }:
+
+cabal.mkDerivation (self: {
+  pname = "pretty-show";
+  version = "1.2";
+  sha256 = "0lbalmyrqisgd2spbvzifsy25lr6cl9sgz78hav8q8r406k7nf2l";
+  isLibrary = true;
+  isExecutable = true;
+  buildDepends = [ haskellLexer ];
+  meta = {
+    homepage = "http://wiki.github.com/yav/pretty-show";
+    description = "Tools for working with derived Show instances";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/development/libraries/haskell/pretty-show/default.nix b/pkgs/development/libraries/haskell/pretty-show/1.5.nix
similarity index 100%
rename from pkgs/development/libraries/haskell/pretty-show/default.nix
rename to pkgs/development/libraries/haskell/pretty-show/1.5.nix
diff --git a/pkgs/top-level/haskell-defaults.nix b/pkgs/top-level/haskell-defaults.nix
index aa71d75f12e..a4793077517 100644
--- a/pkgs/top-level/haskell-defaults.nix
+++ b/pkgs/top-level/haskell-defaults.nix
@@ -53,6 +53,7 @@
       cabalInstall_1_16_0_2 = self.cabalInstall_1_16_0_2.override { Cabal = self.Cabal_1_16_0_3; };
       monadPar = self.monadPar_0_1_0_3;
       jailbreakCabal = self.jailbreakCabal.override { Cabal = self.disableTest self.Cabal_1_14_0; };
+      prettyShow = self.prettyShow_1_2;
     };
 
   ghc703Prefs =
@@ -62,6 +63,7 @@
       cabalInstall_1_16_0_2 = self.cabalInstall_1_16_0_2.override { Cabal = self.Cabal_1_16_0_3; zlib = self.zlib_0_5_3_3; };
       monadPar = self.monadPar_0_1_0_3;
       jailbreakCabal = self.jailbreakCabal.override { Cabal = self.disableTest self.Cabal_1_14_0; };
+      prettyShow = self.prettyShow_1_2;
     };
 
   ghc702Prefs = ghc701Prefs;
@@ -73,6 +75,7 @@
       cabalInstall_1_16_0_2 = self.cabalInstall_1_16_0_2.override { Cabal = self.Cabal_1_16_0_3; zlib = self.zlib_0_5_3_3; };
       monadPar = self.monadPar_0_1_0_3;
       jailbreakCabal = self.jailbreakCabal.override { Cabal = self.disableTest self.Cabal_1_14_0; };
+      prettyShow = self.prettyShow_1_2;
     };
 
   ghc6123Prefs = ghc6122Prefs;
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 82be9a4b789..fcc6557f430 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1471,7 +1471,9 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   ppm = callPackage ../development/libraries/haskell/ppm {};
 
-  prettyShow = callPackage ../development/libraries/haskell/pretty-show {};
+  prettyShow_1_2 = callPackage ../development/libraries/haskell/pretty-show/1.2.nix {};
+  prettyShow_1_5 = callPackage ../development/libraries/haskell/pretty-show/1.5.nix {};
+  prettyShow = self.prettyShow_1_5;
 
   punycode = callPackage ../development/libraries/haskell/punycode {};