diff --git a/pkgs/development/ocaml-modules/ppx_deriving_variant_string/default.nix b/pkgs/development/ocaml-modules/ppx_deriving_variant_string/default.nix
new file mode 100644
index 000000000000..c8fe782e271c
--- /dev/null
+++ b/pkgs/development/ocaml-modules/ppx_deriving_variant_string/default.nix
@@ -0,0 +1,34 @@
+{
+  lib,
+  fetchurl,
+  buildDunePackage,
+  ppxlib,
+  ounit2,
+}:
+
+buildDunePackage (finalAttrs: {
+  pname = "ppx_deriving_variant_string";
+  version = "1.0.1";
+
+  src = fetchurl {
+    url = "https://github.com/ahrefs/ppx_deriving_variant_string/releases/download/${finalAttrs.version}/ppx_deriving_variant_string-${finalAttrs.version}.tbz";
+    hash = "sha256-nSU9LEwPOOQuCpNAVQgBGucHuk5wjJ3dDIj708djLwc=";
+  };
+
+  propagatedBuildInputs = [
+    ppxlib
+  ];
+
+  doCheck = true;
+  checkInputs = [
+    ounit2
+  ];
+
+  meta = {
+    homepage = "https://github.com/ahrefs/ppx_deriving_variant_string";
+    description = "OCaml PPX deriver that generates converters between regular or polymorphic variants and strings.";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.marijanp ];
+    changelog = "https://raw.githubusercontent.com/ahrefs/ppx_deriving_variant_string/${finalAttrs.version}/CHANGES.md";
+  };
+})
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index cd43baf5471b..fd9bbb13ad68 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1713,6 +1713,10 @@ let
 
         ppx_deriving_rpc = callPackage ../development/ocaml-modules/ppx_deriving_rpc { };
 
+        ppx_deriving_variant_string =
+          callPackage ../development/ocaml-modules/ppx_deriving_variant_string
+            { };
+
         ppx_deriving_yaml = callPackage ../development/ocaml-modules/ppx_deriving_yaml {
           mdx = mdx.override { inherit logs; };
         };