diff --git a/pkgs/development/ocaml-modules/duration/default.nix b/pkgs/development/ocaml-modules/duration/default.nix
new file mode 100644
index 000000000000..7b3c1c65fc80
--- /dev/null
+++ b/pkgs/development/ocaml-modules/duration/default.nix
@@ -0,0 +1,22 @@
+{ lib, buildDunePackage, fetchurl, alcotest }:
+
+buildDunePackage rec {
+  pname = "duration";
+  version = "0.1.3";
+
+  src = fetchurl {
+    url = "https://github.com/hannesm/duration/releases/download/${version}/duration-${version}.tbz";
+    sha256 = "0m9r0ayhpl98g9vdxrbjdcllns274jilic5v8xj1x7dphw21p95h";
+  };
+
+  doCheck = true;
+  checkInputs = lib.optional doCheck alcotest;
+
+  meta = {
+    homepage = "https://github.com/hannesm/duration";
+    description = "Conversions to various time units";
+    license = lib.licenses.isc;
+    maintainers = [ lib.maintainers.vbgl ];
+  };
+
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index fd863e428aff..a4b6889ac901 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -234,6 +234,8 @@ let
 
     dune-private-libs = callPackage ../development/ocaml-modules/dune-private-libs { };
 
+    duration =  callPackage ../development/ocaml-modules/duration { };
+
     earley = callPackage ../development/ocaml-modules/earley { };
 
     earlybird = callPackage ../development/ocaml-modules/earlybird { };