diff --git a/pkgs/development/libraries/haskell/pretty-show/1.2.nix b/pkgs/development/libraries/haskell/pretty-show/1.2.nix
deleted file mode 100644
index 545816a57a02..000000000000
--- a/pkgs/development/libraries/haskell/pretty-show/1.2.nix
+++ /dev/null
@@ -1,16 +0,0 @@
-{ 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/1.6.7.nix b/pkgs/development/libraries/haskell/pretty-show/default.nix
similarity index 86%
rename from pkgs/development/libraries/haskell/pretty-show/1.6.7.nix
rename to pkgs/development/libraries/haskell/pretty-show/default.nix
index 7e3e3e25e8a0..56126a42cb36 100644
--- a/pkgs/development/libraries/haskell/pretty-show/1.6.7.nix
+++ b/pkgs/development/libraries/haskell/pretty-show/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "pretty-show";
-  version = "1.6.7";
-  sha256 = "16qjp6cl3hyir5bchnncq95bp7nw5cpp5kd5mszkjjhzw1jj9srz";
+  version = "1.6.8";
+  sha256 = "0vfb712dvbb91659sch62d06vm0451b9l4l0hdwnlbhzjymmh2rs";
   isLibrary = true;
   isExecutable = true;
   buildDepends = [ filepath haskellLexer ];
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 9c33cb8ff479..0a745ead70d0 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1691,9 +1691,7 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   prettyclass = callPackage ../development/libraries/haskell/prettyclass {};
 
-  prettyShow_1_2 = callPackage ../development/libraries/haskell/pretty-show/1.2.nix {};
-  prettyShow_1_6_7 = callPackage ../development/libraries/haskell/pretty-show/1.6.7.nix {};
-  prettyShow = self.prettyShow_1_6_7;
+  prettyShow = callPackage ../development/libraries/haskell/pretty-show {};
 
   punycode = callPackage ../development/libraries/haskell/punycode {};