diff --git a/pkgs/development/libraries/haskell/clean-unions/default.nix b/pkgs/development/libraries/haskell/clean-unions/default.nix
new file mode 100644
index 000000000000..50b8617f6b7e
--- /dev/null
+++ b/pkgs/development/libraries/haskell/clean-unions/default.nix
@@ -0,0 +1,16 @@
+# This file was auto-generated by cabal2nix. Please do NOT edit manually!
+
+{ cabal }:
+
+cabal.mkDerivation (self: {
+  pname = "clean-unions";
+  version = "0.1";
+  sha256 = "1nh4gy2ql2h9njvcx05gl2ng8g3hnvyiqq87nnh1xalsvrkh6j0v";
+  meta = {
+    homepage = "https://github.com/fumieval/clean-unions";
+    description = "Open unions without need for Typeable";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+    maintainers = with self.stdenv.lib.maintainers; [ fuuzetsu ];
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index fec7680f843a..83bf82c42bc6 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -435,6 +435,8 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   clay = callPackage ../development/libraries/haskell/clay {};
 
+  cleanUnions = callPackage ../development/libraries/haskell/clean-unions {};
+
   clientsession = callPackage ../development/libraries/haskell/clientsession {};
 
   clock = callPackage ../development/libraries/haskell/clock {};