diff --git a/pkgs/development/ocaml-modules/webmachine/default.nix b/pkgs/development/ocaml-modules/webmachine/default.nix
new file mode 100644
index 00000000000..79e36b66d11
--- /dev/null
+++ b/pkgs/development/ocaml-modules/webmachine/default.nix
@@ -0,0 +1,32 @@
+{ lib, buildDunePackage, fetchFromGitHub
+, cohttp, dispatch, ptime
+, ounit
+}:
+
+buildDunePackage rec {
+  pname = "webmachine";
+  version = "0.6.1";
+
+  minimumOCamlVersion = "4.04";
+
+  src = fetchFromGitHub {
+    owner = "inhabitedtype";
+    repo = "ocaml-webmachine";
+    rev = "${version}";
+    sha256 = "0kpbxsvjzylbxmxag77k1c8m8mwn4f4xscqk2i7fc591llgq9fp3";
+  };
+
+  propagatedBuildInputs = [ cohttp dispatch ptime ];
+
+  checkInputs = lib.optional doCheck ounit;
+
+  doCheck = true;
+
+  meta = {
+    inherit (src.meta) homepage;
+    license = lib.licenses.bsd3;
+    description = "A REST toolkit for OCaml";
+    maintainers = [ lib.maintainers.vbgl ];
+  };
+
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 6a180492b37..a6491ea9d06 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -847,6 +847,8 @@ let
 
     wasm = callPackage ../development/ocaml-modules/wasm { };
 
+    webmachine = callPackage ../development/ocaml-modules/webmachine { };
+
     wtf8 = callPackage ../development/ocaml-modules/wtf8 { };
 
     x509 = callPackage ../development/ocaml-modules/x509 { };