diff --git a/pkgs/development/libraries/haskell/reducers/default.nix b/pkgs/development/libraries/haskell/reducers/default.nix
new file mode 100644
index 000000000000..319cd138ccec
--- /dev/null
+++ b/pkgs/development/libraries/haskell/reducers/default.nix
@@ -0,0 +1,20 @@
+{ cabal, comonad, fingertree, hashable, keys, pointed
+, semigroupoids, semigroups, text, transformers
+, unorderedContainers
+}:
+
+cabal.mkDerivation (self: {
+  pname = "reducers";
+  version = "3.0.2";
+  sha256 = "0inw5gz3bdrfc6hprjfxssyqjwmclgf09gms14blj24qr027gdqq";
+  buildDepends = [
+    comonad fingertree hashable keys pointed semigroupoids semigroups
+    text transformers unorderedContainers
+  ];
+  meta = {
+    homepage = "http://github.com/ekmett/reducers/";
+    description = "Semigroups, specialized containers and a general map/reduce framework";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index d3a2249e7bf4..15fd26a26286 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1784,6 +1784,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
 
   recaptcha = callPackage ../development/libraries/haskell/recaptcha {};
 
+  reducers = callPackage ../development/libraries/haskell/reducers {};
+
   reflection = callPackage ../development/libraries/haskell/reflection {};
 
   regexBase_0_72_0_2 = callPackage ../development/libraries/haskell/regex-base/0.72.0.2.nix {};