anchor.diff:  
       ${optionalString (cfg.httpConfig != "") ''
       http {
  -      include ${cfg.package}/conf/mime.types;
  +      include ${cfg.package}/etc/nginx/mime.types;
         ${cfg.httpConfig}
       }
       ''}
  
positive.code:       };
  
        stateDir = mkOption {
          default = "/var/spool/nginx";
          description = "
            Directory holding all state for nginx to run.
          ";
  
negative.code:       path = [ nginx ];
        preStart =
          ''
          mkdir -p /var/log/nginx ${cfg.stateDir}
          chmod 700 ${cfg.stateDir}
          chown -R ${cfg.user}:${cfg.group} ${cfg.stateDir}
          '';
  