diff --git a/pkgs/development/libraries/haskell/extensible-effects/default.nix b/pkgs/development/libraries/haskell/extensible-effects/default.nix
new file mode 100644
index 00000000000..f97b5cd5e28
--- /dev/null
+++ b/pkgs/development/libraries/haskell/extensible-effects/default.nix
@@ -0,0 +1,20 @@
+{ cabal, HUnit, QuickCheck, testFramework, testFrameworkHunit
+, testFrameworkQuickcheck2
+}:
+
+cabal.mkDerivation (self: {
+  pname = "extensible-effects";
+  version = "1.2.1";
+  sha256 = "066977hjhcg44v47hkjpf2gs48xsry74l4h8hp753jsvbfsv0030";
+  testDepends = [
+    HUnit QuickCheck testFramework testFrameworkHunit
+    testFrameworkQuickcheck2
+  ];
+  meta = {
+    homepage = "https://github.com/RobotGymnast/extensible-effects";
+    description = "An Alternative to Monad Transformers";
+    license = self.stdenv.lib.licenses.mit;
+    platforms = self.ghc.meta.platforms;
+    maintainers = [ self.stdenv.lib.maintainers.ocharles ];
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 747ce660b51..b23b03a3edb 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -992,6 +992,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
 
   fileLocation = callPackage ../development/libraries/haskell/file-location {};
 
+  extensibleEffects = callPackage ../development/libraries/haskell/extensible-effects {};
+
   extensibleExceptions_0_1_1_0 = callPackage ../development/libraries/haskell/extensible-exceptions/0.1.1.0.nix {};
   extensibleExceptions_0_1_1_2 = callPackage ../development/libraries/haskell/extensible-exceptions/0.1.1.2.nix {};
   extensibleExceptions_0_1_1_3 = callPackage ../development/libraries/haskell/extensible-exceptions/0.1.1.3.nix {};