feat: add flake for native build python dependency

Author: GuillaumeLagrange

flake.lock

@@ -0,0 +1,38 @@
+{
+  description = "CodSpeed Node development environment";
+
+  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 = nixpkgs.legacyPackages.${system};
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            # Needed for node-gyp
+            (python314.withPackages (
+              ps: with ps; [
+                setuptools
+              ]
+            ))
+          ];
+
+          shellHook = ''
+            echo "CodSpeed Node development environment"
+            echo "Python version: $(python --version)"
+          '';
+        };
+      }
+    );
+}