CMake with environment Variables and WSL

I'm trying to cross compile for my raspberry using cmake and wsl. I'm roughly following this guide: https://stackoverflow.com/questions/19162072/how-to-install-the-raspberry-pi-cross-compiler-on-my-linux-host-machine/58559140#58559140

I have a couple of issues:

1. When i set a program argument (i.e. the -DCMAKE_TOOLCHAIN_FILE=..) in the "run configuration" for my Cmake application, it get's copied over to the settings-> cmake page and from then on any changes to the run configuration don't make any difference. I have to go into the settings make changes or remove the setting. Why is that?

2. I have to set some environment variables for the location of the toolchain file, adding the compiler to the PATH etc. Two issues here: 1. The $HOME variable doesn't get resolved (i.e. $HOME/x doesnt turn into /home/myuser/x) and secondly adding something to the PATH doesnt work with PATH=/something/x:PATH. How does CLion handle the ssh login to my WSL? How can I set the env variables correctly?

3. Clion puts all the cmake files in a folder called "cmake-build-debug", where as a normal cmake invocation just puts it in the root. How is that set? Can I change the name of that?

Executing the command that clion excutes for Cmake directly from the WSL Shell works fine, I get a cmake build and can compile with make.