Build flag issue with STM32WLx device

[radiohound]

Hello, I am trying to use build flags to set the region and modem preset in the platformio.ini for a STM32, CDEBYTE-E77-MBL board. For some reason, it is not using the build flags. I have tried:
-D REGION_US
-D LORA_PRESET_MEDIUM_FAST

as well as:
-DREGION_US
-DLORA_PRESET_MEDIUM_FAST

but neither are working for me. Setting these in meshtastic cli or the web client is not an option, because these do not save after reboot.

Am I using the correct build flags, or is there a list somewhere?

Thank you

[github-actions[bot]]

@radiohound, Welcome to Meshtastic! 👋

Thanks for opening your first issue. If it's helpful, an easy way
to get logs is the "Open Serial Monitor" button on the Web Flasher.

If you have ideas for features, note that we often debate big ideas
in the discussions tab
first. This tracker tends to be for ideas that have community
consensus and a clear implementation.

We're very active on discord,
especially the #firmware and #alphanauts-testing channels. If you'll
be around for a while, we'd love to see you there!

Welcome to the community! ❤️

[fifieldt]

Have a look in the userprefs file - you'll see toggles there you can set :)

[radiohound]

Ah, thank you, that worked.