{
  lib,
  php,
  debug ? false,
}: let
  inherit (lib) optionals;
in
  php.buildEnv {
    extensions = {
      enabled,
      all,
    }:
      enabled
      ++ (with all;
        [
          xdebug
          excimer
          inotify
          redis
          oci8
          zip
          pdo
          pdo_pgsql
          pdo_sqlite
          pdo_mysql
          pgsql
          intl
          curl
          mbstring
          pcntl
          ldap
          exif
          gmp
          apcu
          ffi
        ]
        ++ optionals (!debug) [
          smbclient # this breaks the build for no apparent reason
          blackfire
        ]);
    extraConfig = ''
      xdebug.mode=debug,trace,profile
      xdebug.start_with_request=trigger
      xdebug.discover_client_host=false
      xdebug.client_host=hazehost
      xdebug.log_level=0
      xdebug.output_dir=/tmp/xdebug

      memory_limit=512M

      post_max_size 10G
      upload_max_filesize 10G

      apc.enable_cli=1
      opcache.enable_cli=1
    '';
  }