anchor.diff:        };
   
         subsystems = mkOption {
  +        type = types.listOf types.path;
           description = ''
             List of subsystem-path pairs, where the head of the pair
             denotes the subsystem name, and the tail denotes the path to
  
positive.code: 
        srpKeyExchange = mkOption {
          default = false;
          description = ''
            Whether to enable SRP key exchange and user authentication.
          '';
  
negative.code: 
        loginShell = mkOption {
          default = null;
          type = types.nullOr types.str;
          description = ''
            If non-null, override the default login shell with the
            specified value.
  