diff --git a/pkgs/development/libraries/haskell/hashable/default.nix b/pkgs/development/libraries/haskell/hashable/1.1.2.5.nix
similarity index 100%
rename from pkgs/development/libraries/haskell/hashable/default.nix
rename to pkgs/development/libraries/haskell/hashable/1.1.2.5.nix
diff --git a/pkgs/development/libraries/haskell/hashable/1.2.0.2.nix b/pkgs/development/libraries/haskell/hashable/1.2.0.2.nix
new file mode 100644
index 00000000000..10f9c0ec620
--- /dev/null
+++ b/pkgs/development/libraries/haskell/hashable/1.2.0.2.nix
@@ -0,0 +1,15 @@
+{ cabal, text }:
+
+cabal.mkDerivation (self: {
+  pname = "hashable";
+  version = "1.2.0.2";
+  sha256 = "1l827sh7v2jls2gcbxgbvz5hacwi43bcrxwmd3wp92hfwy1yza65";
+  buildDepends = [ text ];
+  meta = {
+    homepage = "http://github.com/tibbe/hashable";
+    description = "A class for types that can be converted to a hash value";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+    maintainers = [ self.stdenv.lib.maintainers.andres ];
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index f5b29d39c4b..3d23010bbb6 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -910,7 +910,9 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   happstackHamlet = callPackage ../development/libraries/haskell/happstack/happstack-hamlet.nix {};
 
-  hashable = callPackage ../development/libraries/haskell/hashable {};
+  hashable_1_1_2_5 = callPackage ../development/libraries/haskell/hashable/1.1.2.5.nix {};
+  hashable_1_3_0_2 = callPackage ../development/libraries/haskell/hashable/1.2.0.2.nix {};
+  hashable = self.hashable_1_1_2_5;
 
   hashedStorage = callPackage ../development/libraries/haskell/hashed-storage {};