$ LANG=C CROSS_COMPILE=arm-ypr0-linux-gnueabi- make clean 
scripts/Makefile.clean:17: /tmp/r0-radio/linux-2.6.24-2.4.2-base/arch/arm/boot/Makefile: No such file or directory
make[1]: *** No rule to make target `/tmp/r0-radio/linux-2.6.24-2.4.2-base/arch/arm/boot/Makefile'.  Stop.
make: *** [archclean] Error 2
make: INTERNAL: Exiting with 3 jobserver tokens available; should be 2!