pull python version from pyproject

Author: fidgetingbits

flake.nix

@@ -22,13 +22,18 @@
               config.allowUnfree = true;
             };
           });
-    in {
+      pythonVersion = builtins.replaceStrings
+        [ "py" ]
+        [ "python" ]
+        (nixpkgs.lib.importTOML ./pyproject.toml).tool.ruff.target-version;
+    in
+    {
       devShells = forEachSupportedSystem ({ pkgs }: {
         default = pkgs.mkShell {
           packages = with pkgs; [
             nodejs
             pnpm
-            python310
+            pkgs.${pythonVersion}
             vsce
             pre-commit
           ];