[question] Can I use foreign build systems like cmake in external dependencies?

I was wondering, what the approach would be to use an external dependency, for example [Apache/Arrow](https://github.com/apache/arrow/tree/main/cpp), which has a rather complicated cmake configuration?

As far as I understand, Buck2 works best if everything is absorbed into the system,. But this is hardly feasible for most external dependencies to rebuild their build system in Buck2.

Sorry, if that is not the right place to ask questions.