00:52:58 (322.67 KB/s) - `/usr/portage/distfiles/NVIDIA-Linux-x86-100.14.23-pkg0.run' saved [7594280/7594280]

 * checking ebuild checksums ;-) ...                                      [ ok ]
 * checking auxfile checksums ;-) ...                                     [ ok ]
 * checking miscfile checksums ;-) ...                                    [ ok ]
 * checking NVIDIA-Linux-x86-100.14.23-pkg0.run ;-) ...                   [ ok ]
 * Determining the location of the kernel source code
 * Unable to find kernel sources at /usr/src/linux
 * This package requires Linux sources.
 * Please make sure that /usr/src/linux points at your running kernel,
 * (or the kernel you wish to build against).
 * Alternatively, set the KERNEL_DIR environment variable to the kernel sources location
 *
 * ERROR: x11-drivers/nvidia-drivers-100.14.23-r10 failed.
 * Call stack:
 *                             ebuild.sh, line 1711:  Called dyn_setup
 *                             ebuild.sh, line  762:  Called qa_call 'pkg_setup'
 *                             ebuild.sh, line   44:  Called pkg_setup
 *   nvidia-drivers-100.14.23-r10.ebuild, line  126:  Called linux-mod_pkg_setup
 *                      linux-mod.eclass, line  465:  Called linux-info_pkg_setup
 *                     linux-info.eclass, line  558:  Called die
 * The specific snippet of code:
 *      get_version || die "Unable to calculate Linux Kernel version"
 *  The die message:
 *   Unable to calculate Linux Kernel version
 *
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/x11-drivers/nvidia-drivers-100.14.23-r10/temp/build.log'.
 *

 * Messages for package x11-drivers/nvidia-drivers-100.14.23-r10:

 * Unable to find kernel sources at /usr/src/linux
 *
 * ERROR: x11-drivers/nvidia-drivers-100.14.23-r10 failed.
 * Call stack:
 *                             ebuild.sh, line 1711:  Called dyn_setup
 *                             ebuild.sh, line  762:  Called qa_call 'pkg_setup'
 *                             ebuild.sh, line   44:  Called pkg_setup
 *   nvidia-drivers-100.14.23-r10.ebuild, line  126:  Called linux-mod_pkg_setup
 *                      linux-mod.eclass, line  465:  Called linux-info_pkg_setup
 *                     linux-info.eclass, line  558:  Called die
 * The specific snippet of code:
 *      get_version || die "Unable to calculate Linux Kernel version"
 *  The die message:
 *   Unable to calculate Linux Kernel version
 *
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/x11-drivers/nvidia-drivers-100.14.23-r10/temp/build.log'.
 *