diff --git a/pkgs/development/tcl-modules/by-name/ru/ruff/package.nix b/pkgs/development/tcl-modules/by-name/ru/ruff/package.nix
new file mode 100644
index 000000000000..62670a6d1169
--- /dev/null
+++ b/pkgs/development/tcl-modules/by-name/ru/ruff/package.nix
@@ -0,0 +1,44 @@
+{
+  lib,
+  mkTclDerivation,
+  fetchzip,
+  tcllib,
+}:
+
+mkTclDerivation rec {
+  pname = "ruff";
+  version = "2.4.2";
+
+  src = fetchzip {
+    url = "mirror://sourceforge/magicsplat/ruff/ruff-${version}.tgz";
+    hash = "sha256-BeO0YtFDSg3e0ehdcpbojAw6WsInkiiHh01I0bYOkRY=";
+  };
+
+  dontBuild = true;
+
+  propagatedBuildInputs = [
+    tcllib
+  ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/lib
+    cp -r . $out/lib/ruff
+
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "Documentation generator for Tcl";
+    longDescription = ''
+      Ruff! (Runtime function formatter) is a documentation generation system
+      for programs written in the Tcl programming language. Ruff! uses runtime
+      introspection in conjunction with comment analysis to generate reference
+      manuals for Tcl programs.
+    '';
+    homepage = "https://ruff.magicsplat.com/";
+    license = lib.licenses.bsd2;
+    maintainers = with lib.maintainers; [ fgaz ];
+  };
+}