FYI, I've found two showstoppers.
1) I couldn't build KiCad with mingw-w64-x86_64-oce 0.17.2-4(KICAD_USE_OCE=ON), due to hard-coded path in OCE-libraries-release.cmake.
I replaced "C:/building/msys64/" with "C:/msys64/", I can build it successfully.
2) I couldn't build KICAD_SCRIPTING_ACTION_MENU option too.
If "KICAD_SCRIPTING_ACTION_MENU=ON", it requires "KICAD_SCRIPTING=OFF."
I hope it will help.