diff --git a/default.nix b/default.nix
index 1285e3b..a8951b7 100644
--- a/default.nix
+++ b/default.nix
@@ -61,6 +61,7 @@ in
     kagefunc = callPythonPackage ./plugins/kagefunc { };
     muvsfunc = callPythonPackage ./plugins/muvsfunc { };
     mvsfunc = callPythonPackage ./plugins/mvsfunc { };
+    vardefunc = callPythonPackage ./plugins/vardefunc { };
   };
 
   getnative = callPythonPackage ./tools/getnative { };
diff --git a/plugins/vardefunc/default.nix b/plugins/vardefunc/default.nix
new file mode 100644
index 0000000..12cb59b
--- /dev/null
+++ b/plugins/vardefunc/default.nix
@@ -0,0 +1,47 @@
+{ lib, vapoursynthPlugins, buildPythonPackage, fetchFromGitHub, python3, vapoursynth }:
+let
+  propagatedBinaryPlugins = with vapoursynthPlugins; [
+    adaptivegrain
+    bilateral
+    eedi3m
+    f3kdb
+    ffms2
+    nnedi3cl
+    scxvid
+    wwxd
+  ];
+in
+buildPythonPackage rec {
+  pname = "vardefunc";
+  version = "1.1.4";
+
+  src = fetchFromGitHub {
+    owner = "Ichunjo";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "0bkchcshxmfcfbqapw367y3cfj1rdz78a55fkcvznvy61fhqvzl7";
+  };
+
+  propagatedBuildInputs = (with vapoursynthPlugins; [
+    fvsfunc
+    havsfunc
+    lvsfunc
+    vsutil
+  ]) ++ propagatedBinaryPlugins;
+
+  postPatch = ''
+    substituteInPlace requirements.txt \
+        --replace "VapourSynth>=51" ""
+  '';
+
+  checkInputs = [ (vapoursynth.withPlugins propagatedBinaryPlugins) ];
+  pythonImportsCheck = [ "vardefunc" ];
+
+  meta = with lib; {
+    description = " Some functions that may be useful ";
+    homepage = "https://github.com/Ichunjo/vardefunc";
+    license = licenses.unfree; # no license
+    maintainers = with maintainers; [ sbruder ];
+    platforms = platforms.all;
+  };
+}