anchor.diff:        };
   
         user = mkOption {
  +        type = types.str;
           default = defaultUser;
           description = ''
             User to be used to perform backup.
  
positive.code: 
        singleTransaction = mkOption {
          default = false;
          description = ''
            Whether to create database dump in a single transaction
          '';
  
negative.code: 
        databases = mkOption {
          default = [];
          type = types.listOf types.str;
          description = ''
            List of database names to dump.
          '';
        };
  
        location = mkOption {
          type = types.path;
          default = "/var/backup/mysql";
          description = ''
            Location to put the gzipped MySQL database dumps.
  