Comment 13 for bug 1370859

Today 3.18.0-3-generic

NVIDIA: calling KBUILD...
make[1]: Entering directory '/usr/src/linux-headers-3.18.0-3-generic'
test -e include/generated/autoconf.h -a -e include/config/auto.conf || ( \
echo >&2; \
echo >&2 " ERROR: Kernel configuration is invalid."; \
echo >&2 " include/generated/autoconf.h or include/config/auto.conf are missing.";\
echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
echo >&2 ; \
/bin/false)
mkdir -p /var/lib/dkms/nvidia-340/340.58/build/.tmp_versions ; rm -f /var/lib/dkms/nvidia-340/340.58/build/.tmp_versions/*
make -f ./scripts/Makefile.build obj=/var/lib/dkms/nvidia-340/340.58/build

but the kernel is installed and boot fine