Link: https://github.com/truenas/scale-build

Readme updated today:

This repository is no longer actively maintained.  

The TrueNAS build system previously hosted here has been moved to an internal infrastructure. This transition was necessary to meet new security requirements, including support for Secure Boot and related platform integrity features that require tighter control over the build and signing pipeline.  

No further updates, pull requests, or issues will be accepted. Existing content is preserved here for historical reference only.  

https://github.com/truenas/scale-build

Wondering if this is just the first step towards doing a minio in the future.

damnit.

Don’t worry, some one did more research than op

https://lemmy.world/comment/22571980

According to their own documentation: https://github.com/truenas/scale-build

The TrueNAS build system previously hosted here has been moved to an internal infrastructure.

This isn't them stopping use of the build, it's them making it proprietary.
They are still using it, just not open-sourcing it.

No. If you read through their statements in the forum thread the user posted in that link, you’ll see that CERTAIN build tools are being removed but they aren’t removing everything from open source.