From 5acd5f7d47f455f20179bfd3e9e88dc1d63cd33d Mon Sep 17 00:00:00 2001
From: Akira Komamura <akira.komamura@gmail.com>
Date: Tue, 22 Sep 2026 21:31:45 +0900
Subject: [PATCH] ocamlPackages.capnp-rpc: init at 2.1.2-unstable-2026-09-13

---
 .../ocaml-modules/capnp-rpc/default.nix       | 56 +++++++++++++++++++
 pkgs/top-level/ocaml-packages.nix             |  2 +
 2 files changed, 58 insertions(+)
 create mode 100644 pkgs/development/ocaml-modules/capnp-rpc/default.nix

diff --git a/pkgs/development/ocaml-modules/capnp-rpc/default.nix b/pkgs/development/ocaml-modules/capnp-rpc/default.nix
new file mode 100644
index 000000000000..88a8653ce46a
--- /dev/null
+++ b/pkgs/development/ocaml-modules/capnp-rpc/default.nix
@@ -0,0 +1,56 @@
+{
+  lib,
+  buildDunePackage,
+  fetchFromGitHub,
+  alcotest,
+  astring,
+  capnp,
+  capnproto,
+  eio,
+  fmt,
+  logs,
+  stdint,
+  uri,
+}:
+
+buildDunePackage (finalAttrs: {
+  pname = "capnp-rpc";
+  version = "2.1.2-unstable-2026-09-13";
+
+  minimalOCamlVersion = "5.2";
+
+  src = fetchFromGitHub {
+    owner = "mirage";
+    repo = "capnp-rpc";
+    rev = "256ad12f21931f04eb88ad4d5cc966b7829bd906";
+    hash = "sha256-zibjsyp4Vin0sZrwWio+h/88bdsVfmFEA7aPmc1IRg0=";
+  };
+
+  nativeBuildInputs = [
+    capnp
+    capnproto
+  ];
+
+  propagatedBuildInputs = [
+    astring
+    capnp
+    fmt
+    logs
+    eio
+    stdint
+    uri
+  ];
+
+  checkInputs = [
+    alcotest
+  ];
+
+  doCheck = true;
+
+  meta = {
+    description = "Cap'n Proto RPC library for OCaml";
+    homepage = "https://github.com/mirage/capnp-rpc";
+    changelog = "https://github.com/mirage/capnp-rpc/blob/v${finalAttrs.version}/CHANGES.md";
+    license = lib.licenses.asl20;
+  };
+})
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index ab60a963ef31..20e3a8008bc6 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -217,6 +217,8 @@ let
 
         capnp = callPackage ../development/ocaml-modules/capnp { };
 
+        capnp-rpc = callPackage ../development/ocaml-modules/capnp-rpc { };
+
         caqti = callPackage ../development/ocaml-modules/caqti { };
 
         caqti-async = callPackage ../development/ocaml-modules/caqti/async.nix { };