This patch will allow the call to make by dkms to use all host cpu cores.
See: https://github.com/dell/dkms/issues/100

--- a/dkms.conf	2019-12-11 17:04:24.000000000 -0500
+++ b/dkms.conf	2020-01-10 12:47:44.770501121 -0500
@@ -1,7 +1,13 @@
+if [ -x /usr/bin/nproc ]; then
+  num_cpu_cores=$(nproc)
+else
+  num_cpu_cores=1
+fi
+
 PACKAGE_NAME="nvidia"
 PACKAGE_VERSION="340.108"
 BUILT_MODULE_NAME[0]="$PACKAGE_NAME"
 DEST_MODULE_LOCATION[0]="/kernel/drivers/video"
-MAKE[0]="make module KERNEL_UNAME=${kernelver}"
+MAKE[0]="make -j$num_cpu_cores module KERNEL_UNAME=${kernelver}"
 CLEAN="make clean"
 AUTOINSTALL="yes"