diff --git ./Makefile ./Makefile
index 13fa4af..0320888 100644
--- ./Makefile
+++ ./Makefile
@@ -122,6 +122,7 @@ verrel:
 
 .PHONY: clean
 clean::
+	rm -rf xen-$(version)/
 	@echo "Running the %clean script of the rpmbuild..."
 	-$(RPMBUILD) --clean --nodeps $(SPECFILE)
 
@@ -153,6 +154,14 @@ update-repo-installer:
 	for pkg in $(xen-pkgs); do ln -f rpm/x86_64/$$pkg*.rpm ../installer/yum/qubes-dom0/rpm/; done
 	ln -f rpm/x86_64/xen-hvm-$(version)gui2*-$(release).$(DIST_DOM0)*.rpm ../installer/yum/qubes-dom0/rpm/
 
+xen-$(version)/.canary: xen-$(version).tar.gz
+	tar xzvf xen-$(version).tar.gz
+	cd xen-$(version) && ../apply-patches ../series.conf ../
+	touch $@
+
+xen.gz: xen-$(version)/.canary
+	$(MAKE) -C xen-$(version)/ xen
+
 help:
 	@echo "Usage: make <target>"
 	@echo
diff --git ./apply-patches ./apply-patches
index b1c8468..74a4c20 100755
--- ./apply-patches
+++ ./apply-patches
@@ -6,8 +6,7 @@
 
 USAGE="$0 [--vanilla] <series.conf> <patchdir> [symbol ...]"
 
-set -e
-set -o pipefail
+set -euf
 if test $# -lt 2; then
 	echo "$USAGE" >&2
 	exit 1
@@ -17,10 +16,7 @@ SERIES_CONF=$1
 PATCH_DIR=$2
 shift 2
 
-(
-	echo "trap 'echo \"*** patch \$_ failed ***\"' ERR"
-	echo "set -ex"
-	egrep -v '^\s*#|^\s*$' <"$SERIES_CONF" | \
-	sed "s|^|patch -s -F0 -E -p1 --no-backup-if-mismatch -i $PATCH_DIR/|"
-) | sh
-
+for i in `egrep -v '^\s*#|^\s*$' < $SERIES_CONF`
+do
+	patch -s -F0 -E -p1 --no-backup-if-mismatch -i $PATCH_DIR/$i
+done
diff --git ./series.conf ./series.conf
index 80972b7..1466c44 100644
--- ./series.conf
+++ ./series.conf
@@ -115,3 +115,5 @@ patches.qubes/libxl-disable-forced-vkb-for-HVM.patch
 patches.qubes/xenconsoled-enable-logging.patch
 patches.qubes/vm-0001-hotplug-do-not-attempt-to-remove-containing-xenstore.patch
 patches.qubes/xen-hotplug-qubesdb-update.patch
+
+patches.heads/heads.patch
diff --git ./patches.heads/heads.patch ./patches.heads/heads.patch
new file mode 100644
index 0000000..bb17c3d
--- /dev/null
+++ ./patches.heads/heads.patch
@@ -0,0 +1,68 @@
+diff --recursive -u ../xen-4.6.5-clean/xen/arch/x86/boot/head.S ./xen/arch/x86/boot/head.S
+--- ../xen-4.6.5-clean/xen/arch/x86/boot/head.S	2017-03-07 11:19:05.000000000 -0500
++++ ./xen/arch/x86/boot/head.S	2017-06-23 21:18:50.498798061 -0400
+@@ -86,6 +86,8 @@
+         cmp     $MULTIBOOT_BOOTLOADER_MAGIC,%eax
+         jne     not_multiboot
+ 
++#if 0
++
+         /* Set up trampoline segment 64k below EBDA */
+         movzwl  0x40e,%eax          /* EBDA segment */
+         cmp     $0xa000,%eax        /* sanity check (high) */
+@@ -108,6 +110,12 @@
+         shl     $10-4,%edx
+         cmp     %eax,%edx           /* compare with BDA value */
+         cmovb   %edx,%eax           /* and use the smaller */
++#else
++	// coreboot does not provide an Extended BIOS Data Area pointer
++	// just stash things the Multiboot structure, adjusted to bytes
++        mov     MB_mem_lower(%ebx),%eax
++        shl     $10-4,%eax
++#endif
+ 
+ 2:      /* Reserve 64kb for the trampoline */
+         sub     $0x1000,%eax
+diff --recursive -u ../xen-4.6.5-clean/xen/arch/x86/boot/mkelf32.c ./xen/arch/x86/boot/mkelf32.c
+--- ../xen-4.6.5-clean/xen/arch/x86/boot/mkelf32.c	2017-03-07 11:19:05.000000000 -0500
++++ ./xen/arch/x86/boot/mkelf32.c	2017-06-23 21:18:50.498798061 -0400
+@@ -231,14 +231,14 @@
+     u32        loadbase, dat_siz, mem_siz;
+     char      *inimage, *outimage;
+     int        infd, outfd;
+-    char       buffer[1024];
++    char       buffer[1024] = {};
+     int        bytes, todo, i;
+ 
+-    Elf32_Ehdr in32_ehdr;
+-    Elf32_Phdr in32_phdr;
++    Elf32_Ehdr in32_ehdr = {};
++    Elf32_Phdr in32_phdr = {};
+ 
+-    Elf64_Ehdr in64_ehdr;
+-    Elf64_Phdr in64_phdr;
++    Elf64_Ehdr in64_ehdr = {};
++    Elf64_Phdr in64_phdr = {};
+ 
+     if ( argc != 5 )
+     {
+--- ../xen-4.6.5-clean/xen/Makefile.orig	2017-06-26 16:11:02.692193372 -0400
++++ ./xen/Makefile	2017-06-26 16:11:46.528708643 -0400
+@@ -97,7 +97,7 @@
+ 	rm -f tags TAGS cscope.files cscope.in.out cscope.out cscope.po.out GTAGS GPATH GRTAGS GSYMS
+ 
+ $(TARGET).gz: $(TARGET)
+-	gzip -f -9 < $< > $@.new
++	gzip -f -9 -n < $< > $@.new
+ 	mv $@.new $@
+ 
+ $(TARGET): delete-unfresh-files
+@@ -121,7 +121,7 @@
+ 	fi
+ 
+ .banner: Makefile
+-	@if which figlet >/dev/null 2>&1 ; then \
++	@if false ; then \
+ 		echo " Xen $(XEN_FULLVERSION)" | figlet -f tools/xen.flf > $@.tmp; \
+ 	else \
+ 		echo " Xen $(XEN_FULLVERSION)" > $@.tmp; \