>>> md5 src_uri ;-) alsa-driver-1.0.8.tar.bz2
 * Determining the location of the kernel source code
 * Found kernel source directory:
 *     /usr/src/linux
 * Found sources for kernel version:
 *     2.6.11-gentoo-r11

 * getfilevar requires 2 variables, with the second a valid file.
 *    getfilevar <VARIABLE> <CONFIGFILE>
 * Could not find a usable .config in the kernel source directory.
 * Please ensure that /usr/src/linux points to a configured set of Linux sources.
 * If you are using KBUILD_OUTPUT, please set the environment var so that
 * it points to the necessary object directory so that it might find .config.

!!! ERROR: media-sound/alsa-driver-1.0.8 failed.
!!! Function linux-info_pkg_setup, Line 509, Exitcode 1
!!! Unable to calculate Linux Kernel version
!!! If you need support, post the topmost build error, NOT this status message.