diff --git a/default.nix b/default.nix
index 2a9c8e8..02e6e56 100644
--- a/default.nix
+++ b/default.nix
@@ -95,4 +95,10 @@ in
   };
 
   getnative = callPythonPackage ./tools/getnative { };
+
+  pythonPackagesExtensions = prev.pythonPackagesExtensions ++ [
+    (python-final: python-prev: {
+      styler00dollar-vsgan-trt = callPythonPackage ./tools/styler00dollar-vsgan-trt { };
+    })
+  ];
 }
diff --git a/tools/styler00dollar-vsgan-trt/default.nix b/tools/styler00dollar-vsgan-trt/default.nix
new file mode 100644
index 0000000..b9cc966
--- /dev/null
+++ b/tools/styler00dollar-vsgan-trt/default.nix
@@ -0,0 +1,63 @@
+{ lib
+, fetchFromGitHub
+, buildPythonPackage
+, python3
+  # Needed to explicitly get the VapourSynth *Python* package.
+, python3Packages
+, numpy
+, torch
+}:
+
+let
+  pythonPackageName = "styler00dollar";
+in
+buildPythonPackage rec {
+  pname = "styler00dollar-vsgan-trt";
+  version = "unstable-2022-09-19";
+
+  src = fetchFromGitHub {
+    owner = "styler00dollar";
+    repo = "VSGAN-tensorrt-docker";
+    rev = "cf9c45cdacba9f19b25e26d0e4767bcfe5d48db0";
+    sha256 = "sha256-L2HwE5r9OMiuupolJJbvPRIzWIRXc9uDSPC2WTZwWl8=";
+  };
+
+  format = "other";
+
+  propagatedBuildInputs = [
+    numpy
+    torch
+    python3Packages.vapoursynth
+  ];
+
+  postPatch = ''
+    sed --in-place 's/src\./${pythonPackageName}./' convert_*_to_onnx.py
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/${python3.sitePackages}
+    # "src" is the actual name of the subdirectory from upstream.
+    cp -r src $out/${python3.sitePackages}/${pythonPackageName}
+
+    mkdir -p $out/examples
+    cp convert_*_to_onnx.py $out/examples
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "VSGAN utility modules from styler00dollar";
+    longDescription = ''
+      Various utility modules by styler00dollar for working with TensorRT.
+
+      This can be used to convert ESRGAN models to to ONXX models, which is
+      required if you want to use ESRGAN models with TensorRT.
+    '';
+    homepage = "https://github.com/styler00dollar/VSGAN-tensorrt-docker";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ aidalgol ];
+    platforms = platforms.all;
+  };
+}