compiling: dkms build uses just one process (no -j X active)

[kolAflash]

Compiling with dkms takes quite long, because just one process is being used.

man dkms says, it calls make with -j"$(nproc)". But that somehow does not seem to work. Not even explicitly calling dkms install -j 2 rtl8192eu/1.0`
makes it use more than one process.

Workaround:
In dkms.conf change MAKE= line to:
MAKE="'make' -j"$(nproc)" all KVER=${kernelver}"