linuxcnc-dev missing on 2.8-rt

Starting with plain debian buster i added: to the apt sources.
installing the RTAI kernel and the linuxcnc packge worked just fine. however the linuxcnc-dev package is simply missing and not in the repo at all. I need this package to compile some custom hal modules. where can i get the package?

sudo apt-get install linuxcnc-uspace-dev

no that wont work im on the buster "2.8-rt" repo see here linuxcnc.org/docs/2.8/html/getting-start...#cha:Installing-RTAI . That is the rtai version. linuxcnc-uspace-dev is in the 2.8-rtpreempt repo and applies only to the preemptrt version of linuxcnc.

sudo apt-get install linuxcnc-dev
does that work?
Just had a look and i can not find RTAI version where the RT versions are.

No the repo dose not contain this package. this is all the packages the repo contains:

the duplicate linuxcnc entry is simply Version: 1:2.8.0 and Version: 1:2.8.1

You are right. That's a bit of an oversight.

I am building the package for 2.8.1 now

OK, it should be available now.