--- main-tree/app-emulation/virtualbox-modules/virtualbox-modules-4.1.8.ebuild	2011-12-20 12:39:22.000000000 +0000
+++ fixed/app-emulation/virtualbox-modules/virtualbox-modules-4.1.8.ebuild	2011-12-21 03:53:46.000000000 +0000
@@ -7,7 +7,7 @@
 
 EAPI=4
 
-inherit eutils linux-mod
+inherit eutils linux-mod linux-info
 
 MY_P=vbox-kernel-module-src-${PV}
 DESCRIPTION="Kernel Modules for Virtualbox"
@@ -28,6 +28,7 @@
 MODULE_NAMES="vboxdrv(misc:${S}) vboxnetflt(misc:${S}) vboxnetadp(misc:${S}) vboxpci(misc:${S})"
 
 pkg_setup() {
+	[ "$(linux_chkconfig_string HZ)" > 1000 ] && die "CONFIG_HZ >1000Hz not supported"
 	linux-mod_pkg_setup
 
 	BUILD_PARAMS="KERN_DIR=${KV_DIR} KERNOUT=${KV_OUT_DIR}"