huge change

wallpapers/flake.nix

@@ -0,0 +1,46 @@
+{
+  description = "Dev env for Catppuccin Mocha LUT: ImageMagick + Python (Pillow) with a generator tool";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+
+        # Python environment with Pillow
+        pythonEnv = pkgs.python3.withPackages (ps: [ ps.pillow ]);
+
+        # Small helper that writes the LUT (256x1), a preview, and a palette.txt
+
+      in {
+        # `nix develop` (or `nix-shell` via legacy) drops you into this environment
+        devShells.default = pkgs.mkShell {
+          packages = [
+            # ImageMagick: on most channels this provides `magick` (v7). If not, you'll have `convert`.
+            pkgs.imagemagick
+            pythonEnv
+          ];
+          shellHook = ''
+            echo
+            echo "Catppuccin Mocha dev shell ready."
+            echo "Generate assets into current dir:"
+            echo "  make-mocha-assets ."
+            echo
+          '';
+        };
+
+        # So you can also `nix run .` to execute the generator
+
+        apps.default = {
+          type = "app";
+        };
+
+        formatter = pkgs.nixpkgs-fmt;
+      }
+    );
+}
+