* 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: app-crypt/truecrypt-4.3a failed.
Call stack:
ebuild.sh, line 1630: Called dyn_setup
ebuild.sh, line 702: Called qa_call 'pkg_setup'
ebuild.sh, line 38: Called pkg_setup
truecrypt-4.3a.ebuild, line 33: 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