diff --git a/pkgs/development/ocaml-modules/ezjsonm-encoding/default.nix b/pkgs/development/ocaml-modules/ezjsonm-encoding/default.nix
new file mode 100644
index 000000000000..ec81d52da687
--- /dev/null
+++ b/pkgs/development/ocaml-modules/ezjsonm-encoding/default.nix
@@ -0,0 +1,20 @@
+{ lib, fetchurl, buildDunePackage, ezjsonm }:
+
+buildDunePackage rec {
+  pname = "ezjsonm-encoding";
+  version = "2.0.0";
+
+  src = fetchurl {
+    url = "https://github.com/lthms/ezjsonm-encoding/releases/download/${version}/ezjsonm-encoding-${version}.tbz";
+    hash = "sha256-e5OPcbbQLr16ANFNZ5i10LjlHgwcRTCYhyvOhVk22yI=";
+  };
+
+  propagatedBuildInputs = [ ezjsonm ];
+
+  meta = {
+    description = "Encoding combinators a la Data_encoding for Ezjsonm";
+    homepage = "https://github.com/lthms/ezjsonmi-encoding";
+    license = lib.licenses.mpl20;
+    maintainers = with lib.maintainers; [ fgaz ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 4b3729bd2164..46866fd88361 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -480,6 +480,8 @@ let
 
     ezjsonm = callPackage ../development/ocaml-modules/ezjsonm { };
 
+    ezjsonm-encoding = callPackage ../development/ocaml-modules/ezjsonm-encoding { };
+
     ezxmlm = callPackage ../development/ocaml-modules/ezxmlm { };
 
     ### F ###