How to specify the order of generator plugins?

Hello, I am using 2 plugins. Custom plugin for generating extra content backed by API and jekyll-redirect-from plugin to create redirects to the additionally generated content as well.

This is my _config.yml

- custom-plugin
- jekyll-redirect-from

However, the order is not respected and the redirect plugin is executed first therefore the redirects do not work correctly.

I am forced to use the priority :highest option in my plugin. This does not seem right as the plugin is for public use.

Seems like its using a regular Ruby sort that is not stable, e.g., if 2 generators have the same priority then their resulting order is not guaranteed.