anchor.diff:  
   let
     cfg = config.services.nextcloud;
  +
  +  phpPackage = pkgs.php73;
  +  phpPackages = pkgs.php73Packages;
   
     toKeyValue = generators.toKeyValue {
       mkKeyValue = generators.mkKeyValueDefault {} " = ";
     };
   
     phpOptionsExtensions = ''
  -    ${optionalString cfg.caching.apcu "extension=${cfg.phpPackages.apcu}/lib/php/extensions/apcu.so"}
  -    ${optionalString cfg.caching.redis "extension=${cfg.phpPackages.redis}/lib/php/extensions/redis.so"}
  -    ${optionalString cfg.caching.memcached "extension=${cfg.phpPackages.memcached}/lib/php/extensions/memcached.so"}
  -    extension=${cfg.phpPackages.imagick}/lib/php/extensions/imagick.so
  +    ${optionalString cfg.caching.apcu "extension=${phpPackages.apcu}/lib/php/extensions/apcu.so"}
  +    ${optionalString cfg.caching.redis "extension=${phpPackages.redis}/lib/php/extensions/redis.so"}
  +    ${optionalString cfg.caching.memcached "extension=${phpPackages.memcached}/lib/php/extensions/memcached.so"}
  +    extension=${phpPackages.imagick}/lib/php/extensions/imagick.so
       zend_extension = opcache.so
       opcache.enable = 1
     '';
  
positive.code:       description = ''
          Enable this option if you plan on using the webfinger plugin.
          The appropriate nginx rewrite rules will be added to your configuration.
        '';
      };
  
      phpPackages = mkOption {
        type = types.attrs;
        default = pkgs.php73Packages;
        defaultText = "pkgs.php73Packages";
        description = ''
          Overridable attribute of the PHP packages set to use.  If any caching
          module is enabled, it will be taken from here.  Therefore it should
          match the version of PHP given to
          <literal>services.phpfpm.phpPackage</literal>.
        '';
      };
  
  
negative.code:                 phpOptions)));
          in {
            phpOptions = phpOptionsExtensions;
            phpPackage = phpPackage;
            listen = "/run/phpfpm/nextcloud";
            extraConfig = ''
              listen.owner = nginx
  