openwrt@fileserver:~/rpi_openwrt/openwrt$ make target/linux/{clean,prepare} V=99
make[1]: Entering directory `/home/openwrt/rpi_openwrt/openwrt'
make[2]: Entering directory `/home/openwrt/rpi_openwrt/openwrt/target/linux'
make[3]: Entering directory `/home/openwrt/rpi_openwrt/openwrt/target/linux/brcm2708'
rm -rf /home/openwrt/rpi_openwrt/openwrt/build_dir/target-arm_arm1176jzf-s+vfp_uClibc-0.9.33.2_eabi/linux-brcm2708
make[3]: Leaving directory `/home/openwrt/rpi_openwrt/openwrt/target/linux/brcm2708'
make[2]: Leaving directory `/home/openwrt/rpi_openwrt/openwrt/target/linux'
make[1]: Leaving directory `/home/openwrt/rpi_openwrt/openwrt'
make[1]: Entering directory `/home/openwrt/rpi_openwrt/openwrt'
make[2]: Entering directory `/home/openwrt/rpi_openwrt/openwrt/target/linux'
make[3]: Entering directory `/home/openwrt/rpi_openwrt/openwrt/target/linux/brcm2708'
rm -rf /home/openwrt/rpi_openwrt/openwrt/build_dir/target-arm_arm1176jzf-s+vfp_uClibc-0.9.33.2_eabi/linux-brcm2708
mkdir -p /home/openwrt/rpi_openwrt/openwrt/build_dir/target-arm_arm1176jzf-s+vfp_uClibc-0.9.33.2_eabi/linux-brcm2708
xzcat /home/openwrt/rpi_openwrt/openwrt/dl/linux-3.6.11.tar.xz | /bin/tar -C /home/openwrt/rpi_openwrt/openwrt/build_dir/target-arm_arm1176jzf-s+vfp_uClibc-0.9.33.2_eabi/linux-brcm2708 -xf -
/bin/tar: This does not look like a tar archive
/bin/tar: Skipping to next header
/bin/tar: Exiting with failure status due to previous errors
make[3]: *** [/home/openwrt/rpi_openwrt/openwrt/build_dir/target-arm_arm1176jzf-s+vfp_uClibc-0.9.33.2_eabi/linux-brcm2708/linux-3.6.11/.prepared] Error 2
make[3]: Leaving directory `/home/openwrt/rpi_openwrt/openwrt/target/linux/brcm2708'
make[2]: *** [prepare] Error 2
make[2]: Leaving directory `/home/openwrt/rpi_openwrt/openwrt/target/linux'
make[1]: *** [target/linux/prepare] Error 2
make[1]: Leaving directory `/home/openwrt/rpi_openwrt/openwrt'
make: *** [target/linux/prepare] Error 2
openwrt@fileserver:~/rpi_openwrt/openwrt$