Hi Daniel,
We are not officially supporting the build process on CentOS. Our machines are using either Windows or OSX. Obviously the transpiled code can be hosted everywhere and can be downloaded directly from our github repository. Are you trying to build it on your own because you plan to modify the sources?
I saw the following guide demonstrating how to run Angular CLI on CentOS. Can you please check the following guide provided by Angular Install Node.js, npm, and Angular on CentOS 7.x. It is for CentOS 7.x but I think you should try it on your environment. If you manage to successfully build thin angular app with scss files we will be able to strike out Angular CLI support for your environment.
Please check and let me know how it went.
Thanks,
Eran.