Initial attempt; going to try something different now.

flake.nix

@@ -0,0 +1,67 @@
+{
+  description = "ComfyUI as a Nix Flake";
+
+  inputs = {
+     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+     flake-utils.url = "github:numtide/flake-utils";
+     comfyuigit = {
+       flake = false;
+       url = "github:comfyanonymous/ComfyUi/v0.3.50";
+     };
+  };
+
+  outputs = { comfyuigit, flake-utils, nixpkgs, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = import nixpkgs {
+          inherit system;
+        };
+        pyenv = pkgs.python312.buildEnv.override {
+          extraLibs = with pkgs.python312Packages; [
+            torchvision
+            torchaudio
+            torchsde
+
+            einops
+            transformers
+            safetensors
+            pyyaml
+            pillow
+            scipy
+            tqdm
+            psutil
+            kornia
+            numba
+            opencv4
+            GitPython
+            numexpr
+            matplotlib
+            pandas
+            imageio-ffmpeg
+            scikit-image
+            pip
+            accelerate
+          ];
+        };
+      in rec {
+        packages = rec {
+          comfyui = pkgs.stdenv.mkDerivation {
+            name = "comfyui";
+            src = comfyuigit;
+            installPhase = ''
+              mkdir -p $out/bin
+              cp -r $src/* $out
+
+              echo "${pyenv}/bin/python main.py" > $out/bin/comfyui
+              chmod +x $out/bin/comfyui
+            '';
+          };
+
+          default = comfyui;
+        };
+
+        devShell = pkgs.mkShell {
+          buildInputs = [packages.comfyuimain pyenv];
+        };
+      }
+  );
+}