diff --git a/pkgs/development/ocaml-modules/cmarkit/default.nix b/pkgs/development/ocaml-modules/cmarkit/default.nix
new file mode 100644
index 00000000000..5015807361f
--- /dev/null
+++ b/pkgs/development/ocaml-modules/cmarkit/default.nix
@@ -0,0 +1,48 @@
+{ lib
+, stdenv
+, cmdliner
+, fetchurl
+, findlib
+, ocaml
+, ocamlbuild
+, topkg
+}:
+
+if lib.versionOlder ocaml.version "4.14.0"
+then throw "cmarkit is not available for OCaml ${ocaml.version}"
+else
+
+stdenv.mkDerivation rec {
+  pname = "cmarkit";
+  version = "0.1.0";
+
+  src = fetchurl {
+    url = "https://erratique.ch/software/cmarkit/releases/cmarkit-${version}.tbz";
+    hash = "sha256-pLPCLlwJt5W5R92HPY8gGpisyjlbSaaEe0HLuJlkjuY=";
+  };
+
+  nativeBuildInputs = [
+    ocaml
+    findlib
+    ocamlbuild
+    topkg
+  ];
+
+  buildInputs = [
+    topkg
+    cmdliner
+  ];
+
+  strictDeps = true;
+
+  inherit (topkg) buildPhase installPhase;
+
+  meta = with lib; {
+    description = "CommonMark parser and renderer for OCaml";
+    homepage = "https://erratique.ch/software/cmarkit";
+    changelog = "https://github.com/dbuenzli/cmarkit/blob/v${version}/CHANGES.md";
+    license = licenses.isc;
+    maintainers = [ maintainers.marsam ];
+    inherit (ocaml.meta) platforms;
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 7f305b79e92..ef5f5d1e7aa 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -196,6 +196,8 @@ let
 
     class_group_vdf = callPackage ../development/ocaml-modules/class_group_vdf { };
 
+    cmarkit = callPackage ../development/ocaml-modules/cmarkit { };
+
     # The 1.1.0 release broke a lot of packages and is not compatible with
     # OCaml < 4.08.
     cmdliner =