diff --git a/pkgs/development/libraries/haskell/unordered-containers/0.1.4.6.nix b/pkgs/development/libraries/haskell/unordered-containers/0.1.4.6.nix
new file mode 100644
index 00000000000..da4616a1367
--- /dev/null
+++ b/pkgs/development/libraries/haskell/unordered-containers/0.1.4.6.nix
@@ -0,0 +1,17 @@
+{ cabal, deepseq, hashable }:
+
+cabal.mkDerivation (self: {
+  pname = "unordered-containers";
+  version = "0.1.4.6";
+  sha256 = "1azwxbrzlzaw54idp3z2xx1xlywzsf1r893blbz51nnwcj9v550d";
+  buildDepends = [ deepseq hashable ];
+  meta = {
+    description = "Efficient hashing-based container types";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+    maintainers = [
+      self.stdenv.lib.maintainers.andres
+      self.stdenv.lib.maintainers.simons
+    ];
+  };
+})
diff --git a/pkgs/development/libraries/haskell/unordered-containers/default.nix b/pkgs/development/libraries/haskell/unordered-containers/0.2.0.0.nix
similarity index 100%
rename from pkgs/development/libraries/haskell/unordered-containers/default.nix
rename to pkgs/development/libraries/haskell/unordered-containers/0.2.0.0.nix
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 6948672936c..029c8b1dbd3 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1221,6 +1221,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   snapCore = callPackage ../development/libraries/haskell/snap/core.nix {
     mwcRandom = self.mwcRandom_0_10_0_1;
+    unorderedContainers = self.unorderedContainers_0_1_4_6;
   };
 
   snapServer = callPackage ../development/libraries/haskell/snap/server.nix {};
@@ -1380,7 +1381,9 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   unixCompat = callPackage ../development/libraries/haskell/unix-compat {};
 
-  unorderedContainers = callPackage ../development/libraries/haskell/unordered-containers {};
+  unorderedContainers_0_1_4_6 = callPackage ../development/libraries/haskell/unordered-containers/0.1.4.6.nix {};
+  unorderedContainers_0_2_0_0 = callPackage ../development/libraries/haskell/unordered-containers/0.2.0.0.nix {};
+  unorderedContainers = self.unorderedContainers_0_2_0_0;
 
   url = callPackage ../development/libraries/haskell/url {};