diff --git a/default.nix b/default.nix
index 8a45986..ae52fcc 100644
--- a/default.nix
+++ b/default.nix
@@ -14,6 +14,7 @@ in
     bm3d = super.callPackage ./plugins/bm3d { };
     cas = super.callPackage ./plugins/cas { };
     cnr2 = super.callPackage ./plugins/cnr2 { };
+    combmask = super.callPackage ./plugins/combmask { };
     continuityfixer = super.callPackage ./plugins/continuityfixer { };
     ctmf = super.callPackage ./plugins/ctmf { };
     d2vsource = super.callPackage ./plugins/d2vsource { };
diff --git a/plugins/combmask/default.nix b/plugins/combmask/default.nix
new file mode 100644
index 0000000..f953440
--- /dev/null
+++ b/plugins/combmask/default.nix
@@ -0,0 +1,44 @@
+{ lib, stdenv, fetchFromGitHub, pkg-config, which, vapoursynth }:
+
+stdenv.mkDerivation rec {
+  pname = "CombMask";
+  version = "1.1.0";
+
+  src = fetchFromGitHub {
+    owner = "chikuzen";
+    repo = pname;
+    rev = version;
+    sha256 = "04axqp44w7vqrc6lr88j7j1xvj18sbx6fyyqjkqlcvqnn0kg4ksn";
+  };
+
+  postPatch = ''
+    # headers are provided by nixpkgs’ vapoursynth
+    rm vapoursynth/src/VapourSynth.h
+  '';
+
+  preConfigure = ''
+    cd vapoursynth/src
+  '';
+
+  configurePhase = ''
+    runHook preConfigure
+
+    bash configure \
+        --extra-cflags="$(pkg-config --cflags vapoursynth)" \
+        --cc="$CC" \
+        --install="$out/lib/vapoursynth"
+
+    runHook postConfigure
+  '';
+
+  nativeBuildInputs = [ pkg-config which ];
+  buildInputs = [ vapoursynth ];
+
+  meta = with lib; {
+    description = "A comb mask create filter for VapourSynth";
+    homepage = "https://github.com/chikuzen/CombMask";
+    license = licenses.lgpl21Plus;
+    maintainers = with maintainers; [ sbruder ];
+    platforms = platforms.all;
+  };
+}