{ inputs = { nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable"; flake-utils.url = "github:numtide/flake-utils"; }; outputs = { self, flake-utils, nixpkgs, }: flake-utils.lib.eachDefaultSystem (system: let pkgs = nixpkgs.legacyPackages.${system}; in { devShells.default = pkgs.mkShell { packages = with pkgs; [ ( python3.withPackages (pyPkgs: with pyPkgs; [ pylsp-mypy python-lsp-ruff python-lsp-server ]) ) ]; }; }); }