diff --git a/pkgs/development/ocaml-modules/atdgen/default.nix b/pkgs/development/ocaml-modules/atdgen/default.nix
new file mode 100644
index 000000000000..d8ef2fec9990
--- /dev/null
+++ b/pkgs/development/ocaml-modules/atdgen/default.nix
@@ -0,0 +1,26 @@
+{ buildDunePackage, atd, biniou, yojson }:
+
+let runtime =
+  buildDunePackage {
+    pname = "atdgen-runtime";
+    inherit (atd) version src;
+
+    propagatedBuildInputs = [ biniou yojson ];
+
+    meta = { inherit (atd.meta) license; };
+  }
+; in
+
+buildDunePackage {
+  pname = "atdgen";
+  inherit (atd) version src;
+
+  buildInputs = [ atd ];
+
+  propagatedBuildInputs = [ runtime ];
+
+  meta = {
+    description = "Generates efficient JSON serializers, deserializers and validators";
+    inherit (atd.meta) license;
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 0af48890ff1c..9c3e81e3177d 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -54,6 +54,8 @@ let
 
     atd = callPackage ../development/ocaml-modules/atd { };
 
+    atdgen = callPackage ../development/ocaml-modules/atdgen { };
+
     base64 = callPackage ../development/ocaml-modules/base64 { };
 
     bap = callPackage ../development/ocaml-modules/bap {