diff --git a/pkgs/development/ocaml-modules/cow/default.nix b/pkgs/development/ocaml-modules/cow/default.nix
new file mode 100644
index 000000000000..eaf07818aeb9
--- /dev/null
+++ b/pkgs/development/ocaml-modules/cow/default.nix
@@ -0,0 +1,32 @@
+{ stdenv, fetchFromGitHub, ocaml, findlib
+, ocamlbuild, topkg, opam
+, uri, xmlm, omd, ezjsonm }:
+
+stdenv.mkDerivation rec {
+  version = "2.2.0";
+  name = "ocaml-cow-${version}";
+
+  src = fetchFromGitHub {
+    owner  = "mirage";
+    repo   = "ocaml-cow";
+    rev    = "v${version}";
+    sha256 = "0snhabg7rfrrcq2ksr3qghiawd61cw3y4kp6rl7vs87j4cnk3kr2";
+  };
+
+  createFindlibDestdir = true;
+
+  buildInputs = [ ocaml opam ocamlbuild findlib topkg ];
+  propagatedBuildInputs = [ xmlm uri ezjsonm omd ];
+
+  inherit (topkg) buildPhase installPhase;
+
+  meta = with stdenv.lib; {
+    description = "Caml on the Web";
+    longDescription = ''
+      Caml on the Web (COW) is a set of parsers and syntax extensions to let you manipulate HTML, CSS, XML, JSON and Markdown directly from OCaml code.
+    '';
+    license = licenses.isc;
+    maintainers = [ maintainers.sternenseemann ];
+    inherit (ocaml.meta) platforms;
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 41cf8306992b..2dd913864a47 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -132,6 +132,8 @@ let
 
     containers = callPackage ../development/ocaml-modules/containers { };
 
+    cow = callPackage ../development/ocaml-modules/cow { };
+
     cpdf = callPackage ../development/ocaml-modules/cpdf { };
 
     cppo = callPackage ../development/tools/ocaml/cppo { };