diff --git a/kernel-xenlinux.spec b/kernel-xenlinux.spec
index b014b73..f2e81c0 100644
--- a/kernel-xenlinux.spec
+++ b/kernel-xenlinux.spec
@@ -308,19 +308,14 @@ done
 
 %post
 
-#Find all network devices
-HIDE_PCI=`lspci -mm -n | grep '^[^ ]* "02'|awk '{ ORS="";print "(" $1 ")";}'`
-
-echo "# This file is autogenerated by kernel post-install script" > /etc/modprobe.d/pciback.conf
-echo "# DO NOT EDIT" >> /etc/modprobe.d/pciback.conf
-echo "" >> /etc/modprobe.d/pciback.conf
-echo "options pciback hide=$HIDE_PCI" >> /etc/modprobe.d/pciback.conf
-
-dracut --force --add-drivers 'xts aesni-intel aes-x86_64 crc32c-intel fpu ghash-clmulni-intel salsa20-x86_64 twofish-x86_64 pciback' \
-    /boot/initramfs-%{kernelrelease}.img %{kernelrelease}
+INITRD_OPT="--mkinitrd --dracut"
+if [ -x /usr/lib/qubes/regenerate_initramfs.sh ]; then
+    /usr/lib/qubes/regenerate_initramfs.sh "%{kernelrelease}"
+    INITRD_OPT="--initrdfile=/boot/initramfs-%{kernelrelease}.img"
+fi
 
 /sbin/new-kernel-pkg --package %{name}-%{kernelrelease}\
-        --initrdfile=/boot/initramfs-%{kernelrelease}.img\
+        $INITRD_OPT \
         --depmod --kernel-args="max_loop=255 rdloaddriver=pciback"\
         --multiboot=/boot/xen.gz --banner="Qubes"\
         --make-default --install %{kernelrelease}