yaml2json.nix

{

  patchPhase = ''
    ${python3}/bin/python - << EOF
    import yaml
    import json
    def yaml2json(yaml_file, json_file):
      with open(yaml_file, "r") as i, open(json_file, "w") as o:
        o.write(json.dumps(yaml.load(i.read())))

    yaml2json("apm-server.yml", "apm-server.json")
    yaml2json("fields.yml", "fields.json")
    EOF
    cat apm-server.json
  '';

}