diff --git a/pkgs/development/ocaml-modules/dum/default.nix b/pkgs/development/ocaml-modules/dum/default.nix
new file mode 100644
index 000000000000..37c00f6b31e9
--- /dev/null
+++ b/pkgs/development/ocaml-modules/dum/default.nix
@@ -0,0 +1,28 @@
+{ lib, fetchFromGitHub, buildOcaml, ocaml
+, easy-format
+}:
+
+buildOcaml rec {
+  name = "dum";
+  version = "1.0.1";
+
+  minimumOCamlVersion = "4.06";
+
+  src = fetchFromGitHub {
+    owner = "mjambon";
+    repo = name;
+    rev = "v${version}";
+    sha256 = "0yrxl97szjc0s2ghngs346x3y0xszx2chidgzxk93frjjpsr1mlr";
+  };
+
+  buildInputs = [ easy-format ];
+
+  doCheck = true;
+
+  meta = with lib; {
+    homepage = https://github.com/mjambon/dum;
+    description = "Inspect the runtime representation of arbitrary OCaml values";
+    license = licenses.lgpl21Plus;
+    maintainers = [ maintainers.alexfmpe ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index a6adfc958152..f90068e00eb4 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -241,6 +241,8 @@ let
 
     duff = callPackage ../development/ocaml-modules/duff { };
 
+    dum = callPackage ../development/ocaml-modules/dum { };
+
     dune = callPackage ../development/tools/ocaml/dune { };
 
     dune_2 = callPackage ../development/tools/ocaml/dune/2.nix { };