diff --git a/pkgs/development/ocaml-modules/charon/default.nix b/pkgs/development/ocaml-modules/charon/default.nix
new file mode 100644
index 000000000000..a1f4604666b1
--- /dev/null
+++ b/pkgs/development/ocaml-modules/charon/default.nix
@@ -0,0 +1,54 @@
+{
+  lib,
+  buildDunePackage,
+  fetchFromGitHub,
+
+  # propagatedBuildInputs,
+  easy_logging,
+  name_matcher_parser,
+  ppx_deriving,
+  unionFind,
+  visitors,
+  yojson,
+
+  nix-update-script,
+}:
+
+buildDunePackage (finalAttrs: {
+  pname = "charon";
+  version = "2026.06.12";
+  __structuredAttrs = true;
+
+  src = fetchFromGitHub {
+    owner = "AeneasVerif";
+    repo = "charon";
+    tag = "nightly-${finalAttrs.version}";
+    hash = "sha256-XCNDFJ8HakRBQ68rWB29R5RF7zhmqmNMna098SvXDE0=";
+  };
+
+  propagatedBuildInputs = [
+    easy_logging
+    name_matcher_parser
+    ppx_deriving
+    unionFind
+    visitors
+    yojson
+  ];
+
+  # The charon-ml test suite requires pre-generated `.llbc` fixtures produced by
+  # running the (Rust) charon binary, which are not part of the OCaml source
+  # distribution, so the tests cannot run here.
+  doCheck = false;
+
+  passthru.updateScript = nix-update-script {
+    extraArgs = [ "--version=unstable" ];
+  };
+
+  meta = {
+    description = "Analyze Rust crates without touching compiler internals";
+    homepage = "https://github.com/AeneasVerif/charon";
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ GaetanLepage ];
+    platforms = lib.platforms.all;
+  };
+})
diff --git a/pkgs/development/ocaml-modules/name_matcher_parser/default.nix b/pkgs/development/ocaml-modules/name_matcher_parser/default.nix
new file mode 100644
index 000000000000..e9763adadd8a
--- /dev/null
+++ b/pkgs/development/ocaml-modules/name_matcher_parser/default.nix
@@ -0,0 +1,42 @@
+{
+  lib,
+  buildDunePackage,
+  charon,
+
+  # nativeBuildInputs,
+  menhir,
+
+  # propagatedBuildInputs,
+  menhirLib,
+  ppx_deriving,
+  visitors,
+  zarith,
+}:
+
+buildDunePackage (finalAttrs: {
+  pname = "name_matcher_parser";
+  inherit (charon) version;
+  __structuredAttrs = true;
+
+  inherit (charon) src;
+
+  nativeBuildInputs = [ menhir ];
+
+  propagatedBuildInputs = [
+    menhirLib
+    ppx_deriving
+    visitors
+    zarith
+  ];
+
+  # No test suite is defined for this package.
+  doCheck = false;
+
+  meta = {
+    description = "Parser to define name matchers";
+    homepage = "https://github.com/AeneasVerif/charon";
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ GaetanLepage ];
+    platforms = lib.platforms.all;
+  };
+})
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index fe300b2eeac4..5d4f8316a419 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -247,6 +247,8 @@ let
 
         checkseum = callPackage ../development/ocaml-modules/checkseum { };
 
+        charon = callPackage ../development/ocaml-modules/charon { };
+
         chrome-trace = callPackage ../development/ocaml-modules/chrome-trace { };
 
         cil = callPackage ../development/ocaml-modules/cil { };
@@ -1423,6 +1425,8 @@ let
 
         ### N ###
 
+        name_matcher_parser = callPackage ../development/ocaml-modules/name_matcher_parser { };
+
         nbd = pkgs.libnbd.override {
           ocamlPackages = self;
           buildOcamlBindings = true;