How to build on Debian 10 - Warning: modules_install: missing 'System.map' file. Skipping depmod

[kopax]

I am trying to build with a fresh Debian 10 installation and I have the following error :

kopax@dka:~/workspace/tmp/acpi_call$ make
make -C /lib/modules/4.19.0-6-amd64/build M=/home/kopax/workspace/tmp/acpi_call modules
make[1]: Entering directory '/usr/src/linux-headers-4.19.0-6-amd64'
  CC [M]  /home/kopax/workspace/tmp/acpi_call/acpi_call.o
In file included from /usr/src/linux-headers-4.19.0-6-common/include/acpi/platform/acenv.h:152,
                 from /usr/src/linux-headers-4.19.0-6-common/include/acpi/acpi.h:22,
                 from /home/kopax/workspace/tmp/acpi_call/acpi_call.c:9:
/usr/src/linux-headers-4.19.0-6-common/include/acpi/platform/aclinux.h:18:2: error: #error "Please don't include <acpi/acpi.h> directly, include <linux/acpi.h> instead."
 #error "Please don't include <acpi/acpi.h> directly, include <linux/acpi.h> instead."
  ^~~~~
/home/kopax/workspace/tmp/acpi_call/acpi_call.c: In function ‘acpi_proc_write’:
/home/kopax/workspace/tmp/acpi_call/acpi_call.c:277:9: error: implicit declaration of function ‘copy_from_user’; did you mean ‘raw_copy_from_user’? [-Werror=implicit-function-declaration]
     if (copy_from_user( input, buff, len )) {
         ^~~~~~~~~~~~~~
         raw_copy_from_user
cc1: some warnings being treated as errors
make[4]: *** [/usr/src/linux-headers-4.19.0-6-common/scripts/Makefile.build:315: /home/kopax/workspace/tmp/acpi_call/acpi_call.o] Error 1
make[3]: *** [/usr/src/linux-headers-4.19.0-6-common/Makefile:1534: _module_/home/kopax/workspace/tmp/acpi_call] Error 2
make[2]: *** [Makefile:146: sub-make] Error 2
make[1]: *** [Makefile:8: all] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.19.0-6-amd64'
make: *** [Makefile:8: default] Error 2

I have tried the fork of acpi_call here

But then I have Warning: modules_install: missing 'System.map' file. Skipping depmod.

Is there anything I am missing to build acpi_call? Thanks for sharing!