diff --git a/pkgs/development/ocaml-modules/miou/default.nix b/pkgs/development/ocaml-modules/miou/default.nix
new file mode 100644
index 000000000000..fff2d16aaf58
--- /dev/null
+++ b/pkgs/development/ocaml-modules/miou/default.nix
@@ -0,0 +1,21 @@
+{ lib, buildDunePackage, fetchurl }:
+
+buildDunePackage rec {
+  pname = "miou";
+  version = "0.1.0";
+
+  minimalOCamlVersion = "5.0.0";
+
+  src = fetchurl {
+    url = "https://github.com/robur-coop/miou/releases/download/v${version}/miou-${version}.tbz";
+    hash = "sha256-WTs6L9j4z1/0wKcGIZVwaNrATRGCTN5A6RwO7tY2phE=";
+  };
+
+  meta = {
+    description = "Composable concurrency primitives for OCaml";
+    homepage = "https://git.robur.coop/robur/miou";
+    changelog = "https://git.robur.coop/robur/miou/src/tag/v${version}/CHANGES.md";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ marsam ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 7be758b6f61b..2403b1d57300 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1084,6 +1084,8 @@ let
 
     minttea = callPackage ../development/ocaml-modules/minttea { };
 
+    miou = callPackage ../development/ocaml-modules/miou { };
+
     mirage = callPackage ../development/ocaml-modules/mirage { };
 
     mirage-block = callPackage ../development/ocaml-modules/mirage-block { };