The directory /lib/modules/6.6.31+rpt-rpi-v8 exists, but it does not have a build subdirectory

[Dbkkkkkkkkkk]

root@raspberrypi:/home/pi/nexmon/patches/bcm43455c0/7_45_154/nexmon# make backup-firmware
cp /lib/firmware/brcm/brcmfmac43455-sdio.bin brcmfmac43455-sdio.bin.orig
root@raspberrypi:/home/pi/nexmon/patches/bcm43455c0/7_45_154/nexmon# make install-firmware

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        S E C U R E   M O B I L E   N E T W O R K I N G               


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            The C-based Firmware Patching Framework                   


                       !!! WARNING !!!                                
Our software may damage your hardware and may void your hardware’s    
 warranty! You use our tools at your own risk and responsibility      

COLLECTING STATISTICS read /home/pi/nexmon/STATISTICS.md for more information
COMPILING src/version.c => obj/version.o (details: log/compiler.log)
GENERATING LINKER FILE gen/nexmon.pre => gen/nexmon.ld
GENERATING LINKER FILE gen/nexmon.pre => gen/flashpatches.ld
LINKING OBJECTS => gen/patch.elf (details: log/linker.log, log/linker.err)
GENERATING MAKE FILE gen/nexmon.pre => gen/nexmon.mk
GENERATING MAKE FILE gen/nexmon.pre => gen/flashpatches.mk
APPLYING FLASHPATCHES gen/flashpatches.mk => brcmfmac43455-sdio.bin (details: log/flashpatches.log)
APPLYING PATCHES gen/nexmon.mk => brcmfmac43455-sdio.bin (details: log/patches.log)
BUILDING DRIVER for kernel 6.6 brcmfmac_6.6.y-nexmon/brcmfmac.ko (details: log/driver.log)
COPYING brcmfmac43455-sdio.bin => /lib/firmware/brcm/brcmfmac43455-sdio.bin
UNLOADING brcmfmac_wcc
UNLOADING brcmfmac
RELOADING brcmfmac
insmod: ERROR: could not insert module /home/pi/nexmon/patches/driver/brcmfmac_6.6.y-nexmon/brcmfmac.ko: Invalid module format
make: *** [Makefile:193：install-firmware] error 1
root@raspberrypi:/home/pi/nexmon/patches/bcm43455c0/7_45_154/nexmon# uname -r
6.6.31+rpt-rpi-v8
root@raspberrypi:/home/pi/nexmon/patches/bcm43455c0/7_45_154/nexmon# ls /lib/modules/6.6.31+rpt-rpi-v7l/build
arch include Makefile Module.symvers scripts tools
root@raspberrypi:/home/pi/nexmon/patches/bcm43455c0/7_45_154/nexmon# ls /lib/modules/6.6.31+rpt-rpi-v7/build
arch include Makefile Module.symvers scripts tools
root@raspberrypi:/home/pi/nexmon/patches/bcm43455c0/7_45_154/nexmon# ls /lib/modules/6.6.31+rpt-rpi-v8/build
ls: 无法访问 '/lib/modules/6.6.31+rpt-rpi-v8/build': 没有那个文件或目录

[jlinktu]

insmod: ERROR: could not insert module /home/pi/nexmon/patches/driver/brcmfmac_6.6.y-nexmon/brcmfmac.ko: Invalid module format

• Have you installed the right kernel headers for your kernel version? (see Kernel 6.1 vs 6.6 #613)
• Have you updated your kernel base without cleaning and re-building the brcmfmac_6.6.y kernel module? - If yes, clean and re-build.
• Manually run insmod /home/pi/nexmon/patches/driver/brcmfmac_6.6.y-nexmon/brcmfmac.ko to see if it provides you with a reason why the loading fails.
• Check if there is additional information on the loading process in dmesg.