diff --git a/pkgs/by-name/ja/jai-jail/package.nix b/pkgs/by-name/ja/jai-jail/package.nix
new file mode 100644
index 000000000000..ba62001d368c
--- /dev/null
+++ b/pkgs/by-name/ja/jai-jail/package.nix
@@ -0,0 +1,50 @@
+{
+  lib,
+  gcc15Stdenv,
+  fetchFromGitHub,
+  autoreconfHook,
+  pkg-config,
+  pandoc,
+  systemd,
+  util-linux,
+  acl,
+}:
+
+gcc15Stdenv.mkDerivation (finalAttrs: {
+  pname = "jai-jail";
+  version = "0.3";
+
+  src = fetchFromGitHub {
+    owner = "stanford-scs";
+    repo = "jai";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-AByC7Xh1FYbQ/4Au396m2zYUxsLqcF1PEbpdz7x6LaQ=";
+  };
+
+  nativeBuildInputs = [
+    autoreconfHook
+    pkg-config
+    pandoc
+    systemd
+  ];
+
+  strictDeps = true;
+  __structuredAttrs = true;
+
+  buildInputs = [
+    util-linux # libmount
+    acl
+  ];
+
+  configureFlags = [ "--with-untrusted-user=jai" ];
+
+  meta = {
+    description = "Lightweight jail for AI CLIs";
+    mainProgram = "jai";
+    homepage = "https://jai.scs.stanford.edu";
+    changelog = "https://github.com/stanford-scs/jai/releases/tag/v${finalAttrs.version}";
+    license = lib.licenses.gpl3Plus;
+    maintainers = with lib.maintainers; [ agentelement ];
+    platforms = lib.platforms.linux;
+  };
+})