Embedded is so fun...
You get to use Code Composer from TI...
How do you add "system" variables and not break your project when someone else downloads it from the repo?

Edit the .cproject file.

TI: Please don't edit the .cproject file, but do it to fix this garbage shit mess.

I knew this intuitively, but this explains a lot:

"Versions 4.0 to 12.8 are based on the Eclipse open source IDE, which can be easily extended to include support for OS level application debug (Linux, Android, Windows Embedded) and open source compiler suites such as GCC. Starting with Version 20 in December 2024, CCS is based on the Eclipse Theia platform and IDE."