From 37e7405d97d295f5f67c1d1c957ccb7d4e202b1e Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Thu, 16 Jul 2026 09:51:34 +0200
Subject: [PATCH] ocamlPackages.lrgrep: init at 0.9

---
 .../ocaml-modules/lrgrep/default.nix          | 37 +++++++++++++++++++
 pkgs/top-level/ocaml-packages.nix             |  2 +
 2 files changed, 39 insertions(+)
 create mode 100644 pkgs/development/ocaml-modules/lrgrep/default.nix

diff --git a/pkgs/development/ocaml-modules/lrgrep/default.nix b/pkgs/development/ocaml-modules/lrgrep/default.nix
new file mode 100644
index 000000000000..7a51a78d623f
--- /dev/null
+++ b/pkgs/development/ocaml-modules/lrgrep/default.nix
@@ -0,0 +1,37 @@
+{
+  lib,
+  fetchurl,
+  buildDunePackage,
+  menhir,
+  cmon,
+  menhirLib,
+  menhirSdk,
+}:
+
+buildDunePackage (finalAttrs: {
+  pname = "lrgrep";
+  version = "0.9";
+
+  minimalOCamlVersion = "4.14";
+
+  src = fetchurl {
+    url = "https://github.com/let-def/lrgrep/releases/download/v${finalAttrs.version}/lrgrep-${finalAttrs.version}.tbz";
+    hash = "sha256-5T3hLkxcvmvKAGQ1kyZrT5+i4/ahOBle7/ekMp9cHHU=";
+  };
+
+  nativeBuildInputs = [ menhir ];
+
+  propagatedBuildInputs = [
+    cmon
+    menhirLib
+    menhirSdk
+  ];
+
+  doCheck = true;
+
+  meta = {
+    license = lib.licenses.isc;
+    description = "Detailed error messages for Menhir-generated parsers";
+    homepage = "https://github.com/let-def/lrgrep";
+  };
+})
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index fddce73cef99..d2672bbeab33 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1161,6 +1161,8 @@ let
 
         lreplay = callPackage ../development/ocaml-modules/lreplay { };
 
+        lrgrep = callPackage ../development/ocaml-modules/lrgrep { };
+
         lru = callPackage ../development/ocaml-modules/lru { };
 
         lsp = callPackage ../development/ocaml-modules/ocaml-lsp/lsp.nix { };