make[1]: Entering directory `/usr/src/linux-headers-2.6.15-23-amd64-generic'
  CHK     include/linux/version.h
make[2]: *** No rule to make target `arch/x86_64/kernel/../../i386/kernel/cpuid.o', needed by `arch/x86_64/kernel/msr.o'.  Stop.
make[1]: *** [arch/x86_64/kernel] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-2.6.15-23-amd64-generic'
make: *** [linux26] Error 2