diff --git a/pkgs/by-name/si/sit/package.nix b/pkgs/by-name/si/sit/package.nix
new file mode 100644
index 000000000000..663d124e49bb
--- /dev/null
+++ b/pkgs/by-name/si/sit/package.nix
@@ -0,0 +1,33 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+}:
+
+stdenv.mkDerivation {
+  pname = "sit";
+  version = "0-unstable-2026-01-05";
+
+  src = fetchFromGitHub {
+    owner = "thecloudexpanse";
+    repo = "sit";
+    rev = "8e3d6416c2b61db99c74e8f1224431dc33a50a34";
+    hash = "sha256-uaeHntgvuyeRKJR7BmHtXdM+70xfdrd4WPQagXkWV/Q=";
+  };
+
+  installPhase = ''
+    runHook preInstall
+    install -Dm755 sit $out/bin/sit
+    install -Dm755 macbinfilt $out/bin/macbinfilt
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "Create StuffIt archives on Unix systems";
+    homepage = "https://github.com/thecloudexpanse/sit";
+    license = lib.licenses.bsd2;
+    maintainers = with lib.maintainers; [ matthewcroughan ];
+    mainProgram = "sit";
+    platforms = lib.platforms.unix;
+  };
+}