Unknown CMake command "set_precore_sources".

[Reekin]

where is this defined? I cant find it anywhere

[PredatorCZ]

You probably forgot git submodule update --init --recursive

[Reekin]

You probably forgot git submodule update --init --recursive

I just downloaded it's zip manually haha. I have managed to build it, but the dlu doesn't work. It will popup error window saying the format is incorrect. So finally I found that alphazolam's mod list release thread gives a build and it works properly.