How to fix "m2c -o scripts/Kbuild.include -e scripts/Kbuild.include scripts/Kbuild.include.mod" when cross compilg linux kernel

Newbie question: How to fix this error?

make[1]: Leaving directory '/home/denis/pmos/device_xiaomi_unified-kernel'make[1]: Entering directory '/home/denis/pmos/device_xiaomi_unified-kernel'm2c    -o scripts/Kbuild.include -e scripts/Kbuild.include scripts/Kbuild.include.modmake[1]: m2c: No such file or directorymake[1]: *** [<builtin>: scripts/Kbuild.include] Error 127make[1]: Leaving directory '/home/denis/pmos/device_xiaomi_unified-kernel'make: *** [Makefile:1255: headers] Error 2

I'm just compiling the kernel with the online guides, I didn't expect that.

I can't find this program anywhere. Debian 12.