diff --git a/pkgs/development/libraries/haskell/stm-delay/default.nix b/pkgs/development/libraries/haskell/stm-delay/default.nix
new file mode 100644
index 000000000000..ee2500db8d3d
--- /dev/null
+++ b/pkgs/development/libraries/haskell/stm-delay/default.nix
@@ -0,0 +1,18 @@
+# This file was auto-generated by cabal2nix. Please do NOT edit manually!
+
+{ cabal, stm }:
+
+cabal.mkDerivation (self: {
+  pname = "stm-delay";
+  version = "0.1.1.1";
+  sha256 = "0cla21v89gcvmr1iwzibq13v1yq02xg4h6k9l6kcprj7mhd5hcmi";
+  buildDepends = [ stm ];
+  testDepends = [ stm ];
+  meta = {
+    homepage = "https://github.com/joeyadams/haskell-stm-delay";
+    description = "Updatable one-shot timer polled with STM";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+    maintainers = with self.stdenv.lib.maintainers; [ ocharles ];
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index ad0056782224..a094cd829045 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -2382,6 +2382,8 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   stmContainers = callPackage ../development/libraries/haskell/stm-containers {};
 
+  stmDelay = callPackage ../development/libraries/haskell/stm-delay {};
+
   STMonadTrans = callPackage ../development/libraries/haskell/STMonadTrans {};
 
   stmStats = callPackage ../development/libraries/haskell/stm-stats {};