How to set the resty.core dir in Kong?

Question

nginx: 1.19 openresty: 1.19

I have installed Kong with --prefix=/home/mykong, it is installed in custom directory /home/mykong. And it created etc usr/local lib automatically under /home/mykong, so the dir is like this

/home/mykong
----usr/local
----etc/kong
----lib

I start Kong under my dir, ./usr/local/bin/kong start -c etc/kong/kong.conf. I got this:

nginx: [alert] failed to load the 'resty.core' module (https://github.com/openresty/lua-resty-core); ensure you are using an OpenResty release from https://openresty.org/en/download.html (reason: module 'resty.core' not found:
    no field package.preload['resty.core']
    no file '/usr/local/openresty/site/lualib/resty/core.ljbc'
    no file '/usr/local/openresty/site/lualib/resty/core/init.ljbc'
    no file '/usr/local/openresty/lualib/resty/core.ljbc'
    no file '/usr/local/openresty/lualib/resty/core/init.ljbc'
    no file '/usr/local/openresty/site/lualib/resty/core.lua'
    no file '/usr/local/openresty/site/lualib/resty/core/init.lua'
    no file '/usr/local/openresty/lualib/resty/core.lua'
    no file '/usr/local/openresty/lualib/resty/core/init.lua'
    no file './resty/core.lua'
    no file '/usr/local/openresty/luajit/share/luajit-2.1.0-beta3/resty/core.lua'
    no file '/usr/local/share/lua/5.1/resty/core.lua'
    no file '/usr/local/share/lua/5.1/resty/core/init.lua'
    no file '/usr/local/openresty/luajit/share/lua/5.1/resty/core.lua'
    no file '/usr in /tmp/resty_IKDrdnjeHs/conf/nginx.conf:62

But resty.core is in /home/mykong/usr/local/openresty/lualib/resty/, so how to set the path for openresty to find resty.core?