root@akos:/lib/modules/2.6.20-16-generic/build# make modules
  CHK     include/linux/version.h
  CHK     include/linux/utsrelease.h
make[1]: *** No rule to make target `arch/x86_64/kernel/../../i386/kernel/cpuid.o', needed by `arch/x86_64/kernel/msr.o'.  Stop.
make: *** [arch/x86_64/kernel] Error 2