!!! ERROR: x11-drivers/ati-drivers-8.37.6-r90 failed.
Call stack:
  ebuild.sh, line 1637:   Called dyn_setup
  ebuild.sh, line 704:   Called qa_call 'pkg_setup'
  ebuild.sh, line 44:   Called pkg_setup
  ati-drivers-8.37.6-r90.ebuild, line 61:   Called linux-mod_pkg_setup
  linux-mod.eclass, line 464:   Called linux-info_pkg_setup
  linux-info.eclass, line 554:   Called die

!!! 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/ati-drivers-8.37.6-r90/temp/build.log'.

!!! This ebuild is from an overlay: '/usr/portage/local/layman/sabayon'