Kernel module cross-compilation fails for ARM64 target

[jkuro-tii]

During cross-compilation for the ARM64 target of the PR, the following error displays. Native compilation for ARM64 is fine.
The problem is the referral to the arch/x86 subdirectory:

Full building log
Error:

Running phase: buildPhase
build flags: SHELL=/nix/store/5mh7kaj2fyv8mk4sfq1brwxgc02884wi-bash-5.2p37/bin/bash KDIR=/nix/store/iqi24h895z78ahh0958ksg3wqsxwbz98-linux-aarch64-unknown-linux-gnu-6.6.71-dev/lib/modules/6.6.71/build MODULEDIR=\$\(out\)/lib/modules/6.6.71/kernel/drivers/char CFLAGS_kvm_ivshmem.o=\"-DCONFIG_KVM_IVSHMEM_SHM_SLOTS=6\"
cp ../drivers/char/ivshmem/kvm_ivshmem.c .
cp ../drivers/char/ivshmem/kvm_ivshmem.h .
make -C /nix/store/iqi24h895z78ahh0958ksg3wqsxwbz98-linux-aarch64-unknown-linux-gnu-6.6.71-dev/lib/modules/6.6.71/build M=/build/source/module modules
make[1]: Entering directory '/nix/store/iqi24h895z78ahh0958ksg3wqsxwbz98-linux-aarch64-unknown-linux-gnu-6.6.71-dev/lib/modules/6.6.71/build'
/nix/store/iqi24h895z78ahh0958ksg3wqsxwbz98-linux-aarch64-unknown-linux-gnu-6.6.71-dev/lib/modules/6.6.71/source/Makefile:768: /nix/store/iqi24h895z78ahh0958ksg3wqsxwbz98-linux-aarch64-unknown-linux-gnu-6.6.71-dev/lib/modules/6.6.71/source/arch/x86/Makefile: No such file or directory
make[2]: *** No rule to make target '/nix/store/iqi24h895z78ahh0958ksg3wqsxwbz98-linux-aarch64-unknown-linux-gnu-6.6.71-dev/lib/modules/6.6.71/source/arch/x86/Makefile'.  Stop.