DKMS make.log for rtl8812au-4.3.8.12175.20140902+dfsg for kernel 4.15.0-29-generic (x86_64)
Tue Jan  8 19:07:40 EST 2019
make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/4.15.0-43-generic/build M=/var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build  modules
make[1]: *** /lib/modules/4.15.0-43-generic/build: No such file or directory.  Stop.
Makefile:1457: recipe for target 'modules' failed
make: *** [modules] Error 2