WIP

flake.nix

@@ -0,0 +1,49 @@
+{
+  description = "puzzleYOU release action";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+
+        python = pkgs.python313.withPackages (ps: with ps; [
+          isort
+          flake8
+          semver
+          toml
+        ]);
+
+        pythonPackage = pkgs.python3Packages.buildPythonPackage {
+          name = "release-action";
+          src = ./.;
+        };
+      in
+        {
+          devShells.default = pkgs.mkShell {
+            buildInputs = [
+              pkgs.envsubst
+              pkgs.just
+              pkgs.gitea-actions-runner
+              python
+            ];
+          };
+
+          packages.default = pkgs.writers.writePython3Bin
+            "release-action"
+            {
+              libraries = with pkgs.python3Packages; [
+                semver # TODO move to setup.py?
+                toml
+                pythonPackage
+              ];
+            }
+            (builtins.readFile ./src/main.py)
+          ;
+        }
+    );
+}