<<< ECU-BUG-ebuild_missing_eclasses >>>
  7|sys-kernel/kpatch|kpatch-0.7.1-r1.ebuild|epatch|alicef@gentoo.org
  7|sys-kernel/kpatch|kpatch-9999.ebuild|epatch|alicef@gentoo.org
<<< open bugs >>>
  https://bugs.gentoo.org/683044 sys-kernel/kpatch-0.6.2_fails_to_build_due_missing_struct_named_&quot;value&quot;.
  https://bugs.gentoo.org/690926 sys-kernel/kpatch-0.6.3[kmod]:_kmod/core/core.c:143:15:_error:_variable_‘trace’_has_initializer_but_incomplete_type