hammy@hammysserver:/usr/src/e1000e-3.8.7/src$ sudo make clean install
*** The target kernel has CONFIG_MODULE_SIG_ALL enabled, but
*** the signing key cannot be found. Module signing has been
*** disabled for this build.
make[1]: Entering directory '/usr/src/linux-headers-5.4.0-109-generic'
make[1]: Leaving directory '/usr/src/linux-headers-5.4.0-109-generic'
*** The target kernel has CONFIG_MODULE_SIG_ALL enabled, but
*** the signing key cannot be found. Module signing has been
*** disabled for this build.
make[1]: Entering directory '/usr/src/linux-headers-5.4.0-109-generic'
  CC [M]  /usr/src/e1000e-3.8.7/src/netdev.o
  CC [M]  /usr/src/e1000e-3.8.7/src/ethtool.o
  CC [M]  /usr/src/e1000e-3.8.7/src/ich8lan.o
  CC [M]  /usr/src/e1000e-3.8.7/src/mac.o
  CC [M]  /usr/src/e1000e-3.8.7/src/nvm.o
  CC [M]  /usr/src/e1000e-3.8.7/src/phy.o
  CC [M]  /usr/src/e1000e-3.8.7/src/manage.o
  CC [M]  /usr/src/e1000e-3.8.7/src/80003es2lan.o
  CC [M]  /usr/src/e1000e-3.8.7/src/82571.o
  CC [M]  /usr/src/e1000e-3.8.7/src/param.o
  CC [M]  /usr/src/e1000e-3.8.7/src/ptp.o
  CC [M]  /usr/src/e1000e-3.8.7/src/kcompat.o
  LD [M]  /usr/src/e1000e-3.8.7/src/e1000e.o
  Building modules, stage 2.
  MODPOST 1 modules
  CC [M]  /usr/src/e1000e-3.8.7/src/e1000e.mod.o
  LD [M]  /usr/src/e1000e-3.8.7/src/e1000e.ko
make[1]: Leaving directory '/usr/src/linux-headers-5.4.0-109-generic'
Copying manpages...
Installing modules...
*** The target kernel has CONFIG_MODULE_SIG_ALL enabled, but
*** the signing key cannot be found. Module signing has been
*** disabled for this build.
make[1]: Entering directory '/usr/src/linux-headers-5.4.0-109-generic'
  INSTALL /usr/src/e1000e-3.8.7/src/e1000e.ko
  DEPMOD  5.4.0-109-generic
Warning: modules_install: missing 'System.map' file. Skipping depmod.
make[1]: Leaving directory '/usr/src/linux-headers-5.4.0-109-generic'
Running depmod...