anchor.diff:  { lib, stdenv, fetchurl, flex, bison, autoconf
   , mysql, libxml2, readline, zlib, curl, postgresql, gettext
   , openssl, pcre, pcre2, pkgconfig, sqlite, config, libjpeg, libpng, freetype
  -, libxslt, libmcrypt, bzip2, icu, openldap, cyrus_sasl, libmhash
  +, libxslt, libmcrypt, bzip2, icu, openldap, cyrus_sasl, libmhash, unixODBC
   , uwimap, pam, gmp, apacheHttpd, libiconv, systemd, libsodium, html-tidy, libargon2, libzip
   }:
   
  
positive.code:   , curlSupport ? config.php.curl or true
    , gettextSupport ? config.php.gettext or true
    , pcntlSupport ? config.php.pcntl or true
    , postgresqlSupport ? config.php.postgresql or true
    , pdo_pgsqlSupport ? config.php.pdo_pgsql or true
    , readlineSupport ? config.php.readline or true
  
negative.code:       ++ optional readlineSupport "--with-readline=${readline.dev}"
        ++ optional sqliteSupport "--with-pdo-sqlite=${sqlite.dev}"
        ++ optional postgresqlSupport "--with-pgsql=${postgresql}"
        ++ optional pdo_odbcSupport "--with-pdo-odbc=unixODBC,${unixODBC}"
        ++ optional pdo_pgsqlSupport "--with-pdo-pgsql=${postgresql}"
        ++ optional pdo_mysqlSupport "--with-pdo-mysql=${if mysqlndSupport then "mysqlnd" else mysql.connector-c}"
        ++ optionals mysqliSupport [
  