anchor.diff:      "--with-ssl=openssl"
       "--with-zlib"
       "--with-bzlib"
  +    "--with-lz4"
       "--with-ldap"
       "--with-lucene"
       "--with-icu"
  
positive.code:     ++ lib.optional withSQLite "--with-sqlite";
  
    meta = {
      homepage = http://dovecot.org/;
      description = "Open source IMAP and POP3 email server written with security primarily in mind";
      maintainers = with stdenv.lib.maintainers; [viric peti rickynils];
      platforms = stdenv.lib.platforms.unix;
    };
  }
  
negative.code: { stdenv, lib, fetchurl, perl, pkgconfig, systemd, openssl
  , bzip2, zlib, lz4, inotify-tools, pam, libcap
  , clucene_core_2, icu, openldap, libsodium, libstemmer
  # Auth modules
  , withMySQL ? false, mysql
  , withPgSQL ? false, postgresql
  