github上下载emqx编译出错

按照github上的指示编译4.2以前的版本,
git clone GitHub - emqx/emqx-rel: Release Project for EMQX Broker prior to 4.3. Newer releases are built here: https://github.com/emqx/emqx
cd emqx-rel
make
_build/emqx/rel/emqx/bin/emqx console

在Make的时候出现error:

root@4e05d8a1cdab:/home/emqx-rel# make
/home/emqx-rel/ensure-rebar3.sh 3.13.2-emqx-4
ln -snf _build/emqx/lib ./_checkouts
EMQX_DESC=“EMQ X Broker” /home/emqx-rel/rebar3 as emqx release
===> Compiling rebar3_run
===> Compiling c_src/rebar3_run.c
===> Linking /home/emqx-rel/_build/default/plugins/rebar3_run/priv/rebar3_run.so
===> Error reading file /home/emqx-rel/_checkouts/emqx_plugin_template/src/emqx_plugin_template.app.src: 1: syntax error before: ‘=’
make: *** [Makefile:78: emqx] Error 1
root@4e05d8a1cdab:/home/emqx-rel# vi /home/emqx-rel/_checkouts/emqx_plugin_template/src/emqx_plugin_template.app.src
root@4e05d8a1cdab:/home/emqx-rel#
root@4e05d8a1cdab:/home/emqx-rel#
root@4e05d8a1cdab:/home/emqx-rel# git clone GitHub - emqx/emqx-rel: Release Project for EMQX Broker prior to 4.3. Newer releases are built here: https://github.com/emqx/emqx

请帮我看看是怎么回事

4.2.x 需要使用 Erlang OTP 22.0 来编译。