* Determining the location of the kernel source code
* Found kernel source directory:
* /usr/src/linux
* 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-video/nvidia-kernel-1.0.8756 failed.
Call stack:
ebuild.sh, line 1555: Called dyn_setup
ebuild.sh, line 668: Called pkg_setup
nvidia-kernel-1.0.8756.ebuild, line 56: Called linux-mod_pkg_setup
linux-mod.eclass, line 465: Called linux-info_pkg_setup
linux-info.eclass, line 549: Called die
!!! Unable to calculate Linux Kernel version
!!! If you need support, post the topmost build error, and the call stack if relevant.