{ pkgs ? import {} }: name: template: data: let jsonFile = builtins.toFile "data.json" (builtins.toJSON data); j2custom = builtins.toFile "j2custom.py" '' def j2_environment(env): env.globals.update( zip=zip ) return env ''; in pkgs.runCommandLocal name { nativeBuildInputs = with pkgs; [ pythonPackages.j2cli yaml2json ]; } '' j2 --customize ${j2custom} -f json ${template} ${jsonFile} > $out ''