Building IVAN on a Raspberry Pi :?:

My main gaming rig is dead and likely to be so for quite awhile, so in the meantime I'm stuck with a Pi4 hauled out of mothballs.

Building from source has not gone well. Installing Cmake went fine, I've installed libsdl2 and libsdl2-dev...

But I'm stuck on this:

CMake Error at /usr/share/cmake-3.25/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
  Could NOT find SDL2 (missing: SDL2_mixer_LIBRARY SDL2_mixer_INCLUDE_DIR)
Call Stack (most recent call first):
  /usr/share/cmake-3.25/Modules/FindPackageHandleStandardArgs.cmake:600 (_FPHSA_FAILURE_MESSAGE)
  cmake/FindSDL2.cmake:197 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  FeLib/CMakeLists.txt:29 (find_package)

Any recommendations on how to proceed?