diff --git a/pkgs/development/libraries/haskell/unbounded-delays/default.nix b/pkgs/development/libraries/haskell/unbounded-delays/default.nix
new file mode 100644
index 000000000000..ccccf9d95d38
--- /dev/null
+++ b/pkgs/development/libraries/haskell/unbounded-delays/default.nix
@@ -0,0 +1,13 @@
+{ cabal }:
+
+cabal.mkDerivation (self: {
+  pname = "unbounded-delays";
+  version = "0.1.0.5";
+  sha256 = "109swgxlv3ywf5g0wgm3gp2y7azd6mqf2lfb9sk21dfzcz28aq4k";
+  meta = {
+    homepage = "https://github.com/basvandijk/unbounded-delays";
+    description = "Unbounded thread delays and timeouts";
+    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 c3ecfc4290ec..b35e728f6b4d 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1773,6 +1773,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   unbound = callPackage ../development/libraries/haskell/unbound {};
 
+  unboundedDelays = callPackage ../development/libraries/haskell/unbounded-delays {};
+
   uniplate = callPackage ../development/libraries/haskell/uniplate {};
 
   uniqueid = callPackage ../development/libraries/haskell/uniqueid {};