diff --git a/pkgs/development/ocaml-modules/ppx_monad/default.nix b/pkgs/development/ocaml-modules/ppx_monad/default.nix
new file mode 100644
index 00000000000..6c71dcb26c5
--- /dev/null
+++ b/pkgs/development/ocaml-modules/ppx_monad/default.nix
@@ -0,0 +1,32 @@
+{ lib, fetchFromGitHub, buildDunePackage
+, ppxlib
+}:
+
+buildDunePackage rec {
+  pname = "ppx_monad";
+  version = "0.2.0";
+
+  duneVersion = "3";
+
+  src = fetchFromGitHub {
+    owner = "niols";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-cbguAddSlUxBK7pmT7vNmtJW9TrVZZjdSJRMT3lqxOA=";
+  };
+
+  propagatedBuildInputs = [
+    ppxlib
+  ];
+
+  doCheck = true;
+  checkInputs = [
+  ];
+
+  meta = {
+    description = "An OCaml Syntax Extension for all Monadic Syntaxes";
+    license = lib.licenses.lgpl3Plus;
+    maintainers = [ lib.maintainers.niols ];
+    homepage = "https://github.com/niols/${pname}";
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index ebf6ba6dc05..974a0d9711b 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1345,6 +1345,8 @@ let
 
     ppx_irmin = callPackage ../development/ocaml-modules/irmin/ppx.nix { };
 
+    ppx_monad = callPackage ../development/ocaml-modules/ppx_monad { };
+
     ppx_repr = callPackage ../development/ocaml-modules/repr/ppx.nix { };
 
     ppx_tools =