diff --git a/pkgs/development/libraries/haskell/categories/default.nix b/pkgs/development/libraries/haskell/categories/default.nix
new file mode 100644
index 00000000000..54483f17701
--- /dev/null
+++ b/pkgs/development/libraries/haskell/categories/default.nix
@@ -0,0 +1,14 @@
+{ cabal, void }:
+
+cabal.mkDerivation (self: {
+  pname = "categories";
+  version = "1.0.6";
+  sha256 = "0i5mrxbhqj5g46lvwbw2m07prjvfwja6q8648qm6bq54z6zrl5cy";
+  buildDepends = [ void ];
+  meta = {
+    homepage = "http://github.com/ekmett/categories";
+    description = "Categories";
+    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 239d1c413b0..4ecb6da5516 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -326,6 +326,8 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   carray = callPackage ../development/libraries/haskell/carray {};
 
+  categories = callPackage ../development/libraries/haskell/categories {};
+
   cassava = callPackage ../development/libraries/haskell/cassava {};
 
   caseInsensitive_1_0_0_1 = callPackage ../development/libraries/haskell/case-insensitive/1.0.0.1.nix {};