Initial attempt; going to try something different now.

flake.lock

@@ -0,0 +1,79 @@
+{
+  "nodes": {
+    "comfyuigit": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1755071198,
+        "narHash": "sha256-vIw22ISbjUnfRB6+TFE7QKbVnEXu6BFAN8lmCGE74/M=",
+        "owner": "comfyanonymous",
+        "repo": "ComfyUi",
+        "rev": "d5c1954d5cd4a789bbf84d2b75a955a5a3f93de8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "comfyanonymous",
+        "ref": "v0.3.50",
+        "repo": "ComfyUi",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1755186698,
+        "narHash": "sha256-wNO3+Ks2jZJ4nTHMuks+cxAiVBGNuEBXsT29Bz6HASo=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "fbcf476f790d8a217c3eab4e12033dc4a0f6d23c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "comfyuigit": "comfyuigit",
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

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];
+        };
+      }
+  );
+}