{ description = "Good basic flake template"; inputs = { nixpkgs.url = "nixpkgs/nixpkgs-unstable"; flake-utils.url = "github:numtide/flake-utils"; }; outputs = { self, nixpkgs, flake-utils }: flake-utils.lib.eachDefaultSystem (system: let systempkgs = nixpkgs.legacyPackages.${system}; in { devShells.default = systempkgs.mkShell { buildInputs = with systempkgs; [ python3 # This probably needs other stuff, like flake8 python311Packages.python-lsp-server ]; }; } ); }