Hi, i normally compile wireguard in my debian machine. Having to change my laptop i tried to recompile it and on the make module-install i
get this error:

 INSTALL /home/lele/Downloads/tmp/test/WireGuard/src/wireguard.ko
  DEPMOD  4.19.0-5-amd64
Warning: modules_install: missing 'System.map' file. Skipping depmod.
depmod -a

All the dependencies are installed as listed on the wireguard page.
some suggestions?

Thanks
Emanuele