I'm following this guide http://doc.slitaz.org/en:guides:nvidia to install legacy nvidia drivers from the nvidia website to support my Geforce4 MX420 card. Everything goes fine till this step:
make oldconfig && make prepare
At this point I get an error: no rule to make target "oldconfig"
The directory I called this command in was /usr/src/linux-2.6.30.6-slitaz
Also, I've tried the slitaz free and non-free drivers, they both didn't work since they don't use the nvidia legacy driver.